AES Corporation (2) (NYSE:AES)

Allegheny Energy (4) (NYSE:AYE)

Alliant Energy (NYSE:LNT) - provides electric, natural gas, water, and steam services to customers worldwide.

Ameren (NYSE:AEE) - serves electric and natural gas customers throughout Missouri and Illinois.

American Electric Power (AEP) (3) (NYSE:AEP)

APS Energy Services - offers energy and energy-related products and services to the commercial, industrial, and residential markets in the western U.S.

Arizona Public Service - offers energy and electric services for residences and businesses in the Southwest.

Automated Power Exchange - provides automated buying and selling of electricity and transmisison services. Also provides software, training and consulting for new decentralized power markets.

Avista Corporation (3) (NYSE:AVA)

Black Hills Corporation (NYSE:BKH) - diversified holding company with fuel production, energy marketing, and power generation operations.

Bonneville Power Administration@

Burmeister - includes utility products, online ordering, and list of manufacturers.

Calpine Corporation (2) (NYSE:CPN)

Caltex Energy - provides natural gas, electricity, and energy services to businesses in California.

Caribbean Utilities Company, Ltd. - supplier and distributor of electricity to Grand Cayman.

Central Vermont Public Service Corporation (1) (NYSE:CV)

Chimney Rock Public Power District (CRPPD) - publicly owned rural electric distribution system serving Morrill, Scottsbluff, and small parts of Banner, Sioux, and Box Butte Counties in the Nebraska panhandle.

Cinergy (1) (NYSE:CIN)

Con Edison Company of New York - providing electricity, natural gas, and steam service to New York City and Westchester County.

Connecticut Valley Electric Exchange (CONVEX) - convex provides a transmission control center for Connecticut and western Massachusetts; the site contains real-time power watch and warning system for Connecticut.

Dawson Public Power District - serving central Nebraska. Site offers online meter reading, links for kids, and more.

Dayton Power & Light Co. (4) (NYSE:DPL)

Detroit Edison - investor-owned electric utility serving customers in southeastern Michigan.

DQE, Inc. (2) (NYSE:DQE)

DTE Energy (3) (NYSE:DTE)

Duke Energy (4) (NYSE:DUK)

Eastern Utilities

EDP Electricidade de Portugal Group (NYSE:EDP) - electricity operator and multidisciplinary organization including telecommunications and Internet services.

El Paso Electric (NYSE:EE) - generates and distributes electricity to customers in the Rio Grande Valley in west Texas and southern New Mexico.

Electric America - electricity supplier in California and Pennsylvania offering power services, utilities, energy products, and emergency survival kits.

ElectricNet OnLine Directory - buyer's guide and marketplace for electrical power professionals with information on products, services, events, and organizations.

Empire District Electric Company (NYSE:EDE) - investor-owned utility providing electric service to customers in southwest Missouri, southeast Kansas, northeast Oklahoma, and northwest Arkansas.

Endesa (NYSE:ELE) - generates, transports, and distributes electricity.

Enel SpA (NYSE:EN) - generates, transmits, and distributes electricity.

Energiselskabet Arke - energiforsyning, elforsyning, lokalvarme, elbiler, solceller, varmepumper, energirådgivning

Entergy Corporation (1) (NYSE:ETR)

Exelon Corporation (NYSE:EXC) - generator and provider of natural gas, coal, hydro, nuclear, solar, and wind-generated electricity. Parent company of PECO and ComEd (Commonwealth Edison).

First Energy Services - deregulated energy utility offering electricity, natural gas, and telecommunications services to both commercial and residential customers.

FirstEnergy (2) (NYSE:FE)

Florida Power & Light - investor-owned utility providing electric power throughout Florida.

Florida Public Utilities Company (AMEX:FPU) - distributing natural and propane gas, electricity, and water to different areas in Florida.

Genova Power Company - specializes in the development and acquisition of clean power generation facilities.

GPU, Inc. - provides utility and utility-related services.

Great Plains Energy (NYSE:GXP) - engages in the generation, transmission, distribution, and sale of electricity.

Green Mountain Power Corp (3) (NYSE:GMP)

Hafslund ASA - owns and operates power plants in Norway and in the U.S.

Hawaiian Electric Industries (NYSE:HE)

Huaneng Power International (NYSE:HNP) - develops, constructs, operates, and manages thermal power plants.

Hunt Power - functions as a project development organization, seeking opportunities in the utility marketplace.

IDACORP, Inc. (5) (NYSE:IDA)

Idaho Power - provides electric service to residential and business customers in southern Idaho, eastern Oregon, and northern Nevada.

Illinois Power Company - energy services holding company.

International Power (NYSE:IPR) - independent power producer active in all phases of the power generation chain.

IPALCO Enterprises, Inc. - holding company for Indianapolis Power and Light Company and Mid-America Capital Resources, which generates, transmits, distributes, and sells electricity.

LG&E Energy Corp@

Maine Public Service Company (AMEX:MAM) - electric utility company serving Northern Maine.

MDU Resources Group, Inc. (4) (NYSE:MDU)

MGE Energy (Nasdaq:MGEE) - distributes electricity to residential, commercial, and industrial customers in southern Wisconsin.

MidAmerican Energy Holdings Company (3)

Minnesota Power Inc. - diversified utility company with operations in electric operations, water services, automobile services, and investments.

Municipal Electric Systems of Oklahoma (MESO) - public power utility.

National Grid Group - specialises in the provision of electricity transmission and in building telecommunications networks.

New Century Energies - a holding Company for PSCo and SPS, is engaged in the generation, purchase, transmission, distribution and sale of electricity and in the purchase, transmission, distribution, sale and transportation of natural gas.

New York Independent System Operator (NYISO) - Albany-based operator of New York's transmission system.

Niagara Mohawk Power Corporation - engaged in the generation, purchase, transmission, distribution, and sale of electricity and gas in New York State.

NiSource (NYSE:NI) - holding company whose operating units engage in virtually all phases of the natural gas business.

Northeast Utilities (5) (NYSE:NU)

Northern States Power (1)

NorthWestern Corporation - distributes electricity and natural gas to customers in Montana, South Dakota, and Nebraska.

Northwestern Energy - produces and sells energy and related services and products.

NStar (2) (NYSE:NST)

Oklahoma Gas & Electric (1) (NYSE:OGE)

Orion Power Holdings - provider of wholesale power, gas, and energy services.

Otter Tail Power Corporation (5) (Nasdaq:OTTR)

Pacific Gas and Electric - provides natural gas and electric service to customers in northern and central California.

PG&E Corporation (5) (NYSE:PCG)

Pinnacle West Capital Corp (5) (NYSE:PNW)

Potomac Electric Power Company (PEPCO) (NYSE:POM) - delivers electricity to homes and businesses in the District of Columbia and its Maryland suburbs.

PowerGen PLC@

PPL Corporation (4) (NYSE:PPL)

Progress Energy (4) (NYSE:PGN)

Public Service Company of New Mexico (PNM) (1) (NYSE:PNM)

Public Service Enterprise Group@ (NYSE:PEG)

Puget Sound Energy (NYSE:PSD) - delivers electricity, natural gas, and other energy solutions.

Reliant Resources (NYSE:RRI) - provider of electricity and energy services to wholesale and retail customers.

Rochester Gas and Electric - provides electric and gas energy and related services in upstate New York.

SCANA Corporation (1) (NYSE:SCG)

Scottish Power PLC@ (NYSE:SPI)

Seattle City Light - electric utility serving the local metro area.

ServiceOne - providing appliance repair, home warranty, heating and cooling, service contracts.

Sierra Pacific Power Company - local electric and gas utility serving customers throughout northern Nevada and northeastern California.

SmartEnergy.com - electricity and natural gas services to residential and small business customers online. Offers bill presentment, payment options, and 24-hour account access.

Southern Company (4) (NYSE:SO)

TECO EnergySource - markets highly efficient, natural gas-fueled electricity from TECO Power Services plants to wholesale customers throughout the Sun Belt.

Tennessee Valley Authority (3)

Texas Genco (NYSE:TGN) - wholesale electric power generating company.

TNP Enterprises, Inc. - holding company whose subsidiaries provide electricity and energy services in Texas and New Mexico.

TransAlta Corporation (NYSE:TAC) - electric energy utility with operations in Canada, New Zealand, Australia, and the United States.

Tucson Electric Power Company (2) (NYSE:UNS)

UGI Corporation (2) (NYSE:UGI)

UIL Holdings Corporation (2) (NYSE:UIL)

UniGridEnergy.com - online energy marketplace for electricity trading and transmission services. Learn of bids or offers anywhere, anytime, using pagers, faxes, or e-mail.

Unitil Systems, Inc (2) (AMEX:UTL)

USDA Rural Utilities Service (RUS)@

Utility Choice Electric (UCE) - providing electric power and related services to residential, commercial, and industry customers in Texas.

UtilityGuide - information network for electricity users.

UtilityStore.com, The - provides brand name revenue grade electric watthour meters, metering related products, and current and voltage transformers.

Vanyo Incorporated - distributor of power products to the electric utility industry.

Wattage Monitor - nationwide, free service offering residential and commercial electric consumers their specific electric service options. Competing electric suppliers' rates and services are shown by zip code in a comparative layout.

Weather and Electricity Demand Forecast - sells temperature and power demand forecasts for major power companies in the continental United States.

Western Resources (1) (NYSE:WR)

Wisconsin Energy Corporation (NYSE:WEC) - holding company with a portfolio of subsidiaries engaged in electric generation, electric, gas, steam, and water distribution, pump manufacturing, and other non-utility businesses.

WPS Resources Corporation@ (NYSE:WPS)

Wygen - energy generation unit involved in the wholesale generating and selling of electric power and energy.

Xcel Energy (NYSE:XEL) - utility company serving electricity and natural gas customers.

Connectiv - provides electric service to customers in southern New Jersey, Delaware, and the Eastern Shore of Maryland and Virginia.