IBISWorldLook at the Utilities section for a list of reports.
Plunkett Research Online has a section on "Energy & Utilities" and "Alternative Energy".
Edison Electric Institute (EEI) Supplies industry statistics and information on electric power industry issues. While their statistical handbook costs over $500 there is sone key industry information in the website
North American Electric Reliability Council (NERC)Web site contains information on standards, reliability assessments, full-text annual reports, plus other reference documents
American Wind Energy AssociationTrade association representing wind power plant developers, wind turbine manufacturers, utilities and others in the wind industry. It contains outlooks for 2005-2006