The Energy Policy Act of 2005 extends Daylight Savings Time beginning this year.
Dr. David Prerau has written the definitive book on the story of DST, Seize the Daylight: The Curious and Contentious Story of Daylight Saving Time. Check out the Seize the Daylight web site to read some interesting facts about Daylight Savings Time, for example did you know that Benjamin Franklin, living in Paris, first conceived the notion of daylight saving time. And Europe just calls it "Summer time".
Other web sites with information about daylight savings time include:
The California Energy Commission - with facts related to the energy saved
And of course, good old Wikipedia