American: The Bill Hicks Story is a touching, hagiographic documentary about one of the finest comedians to emerge from the US who was grossly undervalued in his homeland. Made by two British filmmakers with a strange semi-animated technique there's plenty of home videos and early footage peppering the testimony from friends and family. There's nothing particularly revelatory here if you're already a fan but it's still a great watch.
Near the end of the film there's a bit about toothless Dave Letterman cutting Hicks' final performance on the show so in case you're interested here he is trying to make amends to Bill's mum last year.
Parts 2 & 3 and one of my favourite Hicks bits below