Just got done watching an Inconvenient Truth (the movie about Global Warming)... there is definitely some annoying political baggage in there, but there is a lot of useful information that everyone should be armed with when talking to the head-in-the-sand crowd. Watch it.
Also saw the ham comedy RV. Pretty good stuff. Standard Robin Williams fare in some regards but worth seeing. I don't like corn-ball humor usually but this movie was pretty well done for that category IMO.