- ABB Power T&D
- Abria
- AGL Resources
- AGIP Gas
- American Electric Power
- Amoco Energy Trading
- ANR Pipeline
- Arch Coal
- American Boiler Manufacturers Assoc.
- Armitage Associates
- Atlantic Energy
- Automated Power Exchange
- Bank of America
- Bloomberg LLP
- Bominflot
- Booz Allen
- Boralex
- BP Amoco
- BP Energy Corp
- BP Oil Supply
- Cape Wind Associates
- Carbon Services LLC
- Cargill
- Charles River Associates
- Chase Manhattan Bank
- Chemconnect
- Chicago Board of Trade
- Chicago Corporation
- Clinton Energy
- CINC
- Cinergy
- Citizens Power
- Citrus Corp (Enron/Sonat)
- CLECO
- Coal Trading Association
- Columbia Energy
- Con Ed of New York
- Con Ed Solutions
- Constellation Energy
- CT Clean Energy Fund
- Dayton Power & Light
- Deloitte Touche LLP
- Detroit Edison
- Dominion Resources
- DTE Energy Trading
- Duane Morris LLP
- Duke
- Dynegy
- El Paso Energy
- Enron Capital & Trade Resources
- Electric Power Research Institute (EPRI)
- Emission Credit Brokers
- Entergy Nuclear
- Ernst & Young LLP
- FERC
- Eugene Water & Electric Board
- Florida Progress Corp.
- Goldman Sachs
- GPU Energy
- Harlow Butler
- Hydro Quebec
- Idaho Power
- Infinity Sungard
- Irving Oil
- Itochu International
- JP Morgan
- JP Morgan Chase
- Kema Consulting
- Kentucky Utilities
- Kinder Morgan
- Kiodex
- Koch Energy Services
- LaFarge
- Lawrence Berkeley Laboratory
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- Mobil LNG & Power
- McKinsey & Company
- Midcon Power Services
- Montana Power
- Natural Gas Exchange (NGX)
- Natural Gas Supply Association
- NICOR
- NIPSCO
- Northeast Utilities
- NRG Energy
- Nxegen
- NYMEX
- NYSERDA
- Old Dominion Electric
- Ontario Hydro
- Optimum Energy Brokers
- Orlando Utilities Commission
- Otter Tail Power
- Pacer Power
- Pacificorp
- Peco Energy
- PEPEX
- Pequot Capital
- PetroCanada
- Phibro Energy
- Pinnacle West
- Plantergy
- Pratt & Whitney
- Prebon Yamane
- Primary Power International
- Proliance Energy
- Public Service Electric & Gas
- RedMeteor.com
- Reuters America
- Risk Publications
- SeaWest Wind Power
- Sempra Energy Trading
- Siemens
- SigCorp
- SMUD
- Socal Edison
- Societe Generale
- Solarc
- Southern Indiana
- Spectron Energy
- Sterling Planet
- STM Power
- Sungard
- Swiss Re
- Sybase Inc.
- Talisman Oil
- Taylor Companies
- Teton Energy Partners
- Tosco/Philips
- Toyota Motor Sales
- Tradespark LP
- Tractebel Energy
- TradeCapture
- TransAlta Energy
- TransCanada Pipeline
- TransCurrent (Vattenfall)
- Triple Point Technology
- TrueQuote
- TU Electric
- TVA
- U.S. Department of Energy
- Utilicorp United
- Virginia Power
- Wheelabrator Technologies
- Williams Energy Services
- Wintex Energy
- Wisconsin Electric
- WPS Power
- Zilkha Renewable Energy
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