Now we know why Al Gore was too busy to come on Earthcast08. :-) He was on the Oprah show! This site actually has some great resources for "going green" including suggestions for taking action and working to change laws.
Video clip of Al Gore talking about global warming and going green on the Oprah show-April 22, 2008. Lots of great resources including a Green Checklist, organizations working to help the environment and a message board to share your story. Also has tips for getting laws changed.