It's in their database but in the SAVE category for now, but I highly recommend Driver 23/Atlas Moth. I've only seen Driver 23, but it chronicles the FIVE (I believe) YEAR process of a deliveryman with OCD's band, Dark Horse, recording a record. It's epic. Atlas Moth is the follow-up.
Waltz with Bashir looks pretty awesome.
Beautiful Losers is a great doc about artists Ed Templeon, Barry McGee, Mike Mills and others.
You're Gonna Miss Me. The Roky Erickson doc.
I also recommend you watch the entire Party Down series as well as Zach G Live and any Katt Williams they have on there. seriously.