Sorry if it was posted already but I everyone should check out "Exit Thru The Gift Shop" a great documentary on street art and about the man who filmed it.
Exit Thru The Gift Shop is excellent. Definitely in my top 5 for films last year. You can also watch it through Hulu at the moment, however, they only have it in SD and you have to pay up for their shitty Hulu Plus to get the HD now.
Another excellent art documentary is The Art of the Steal. After watching it, you'll never think about wills in the same way, or how - and i'm sorry to say this - Philadelphia is run by a bunch of assholes.