Alabama Power
   Alliant Energy—Iowa
   Alliant Energy—Wisconsin
   Ameren Illinois
   Ameren Missouri
   Arizona Public Service 
   Atmos Energy Corporation 
   Austin Energy
   Avista Utilities
   Baltimore Gas and Electric Company
   BC Hydro
   Berkshire Gas
   Black Hills Energy—Colorado
   Black Hills Energy—Iowa
   Bonneville Power Administration
   Cape Light Compact
   City of Palo Alto Utilities
   City Utilities of Springfield—Missouri
   Columbia Gas of Massachusetts
   Columbia Gas of Ohio
   Commonwealth Edison Company
   Connecticut Natural Gas
   Consolidated Edison Company
   Consumers Energy
   DC Sustainable Energy Utility
   DTE Energy
   Duke Energy
   Efficiency Maine
   Efficiency Vermont
   Energy Trust of Oregon
   Eugene Water & Electric Board
   Focus on Energy—Wisconsin
   Gaz Métro
   Georgia Power
   Great Plains Natural Gas
   Gulf Power
   Hawaii Energy Efficiency Program
   Hydro One
   Idaho Power
   Indianapolis Power & Light Company
   Iowa Energy Center
   Liberty Utilities
   Los Angeles Department of
     Water and Power
   Massachusetts Department of Energy
   MidAmerican Energy
   Minnesota Department of Commerce
   Mississippi Power
   Montana-Dakota Utilities

   National Grid
   Natural Resources Canada
   NB Power
   Nebraska Public Power District
   New Hampshire Electric Co-Op
   New Jersey Natural Gas
   New Mexico Gas Company
   New York Power Authority
   New York State Energy Research and
     Development Authority
   Newfoundland Power
   Nicor Gas
   Northern California Power Agency
   NV Energy
   Oregon Department of Energy
   Pacific Gas and Electric Company
   Peoples Gas
   Platte River Power Authority
   Potomac Electric Power Company (Pepco)
   PSEG Long Island
   Public Service Electric & Gas
   Puget Sound Energy 
   Questar Gas
   Rocky Mountain Power—Utah
   Rocky Mountain Power—Wyoming
   Sacramento Municipal Utility District
   Salt River Project
   San Diego Gas & Electric Company
   Seattle City Light
   Snohomish County PUD 
   South Jersey Gas
   Southern California Edison
   Southern California Gas Company
   Southern Company
   Southern Connecticut Gas
   Southern Minnesota Municipal Power
   Southwest Gas
   Tacoma Power
   Tampa Electric
   Tennessee Valley Authority
   Union Gas
   United Illuminating Company 
   Vectren Corporation
   Vermont Department of Public Service
   Vermont Gas
   Xcel Energy

Efficiency Organizations and National Labs

   American Council for an Energy-Efficient Economy
   California Energy Commission
   California Institute for Energy and Environment
   Fraunhofer Center for Sustainable Energy Systems 
   Lawrence Berkeley National Laboratory
   Massachusetts Department of Energy Resources
   National Renewable Energy Laboratory
   Natural Resources Defense Council
   Northeast Energy Efficiency Partnerships
   Northwest Energy Efficiency Alliance
   Oak Ridge National Laboratory
   Pacific Northwest National Laboratory
   Southwest Energy Efficiency Project