GRASS: A History of Marijuana I can't recommend this movie enough, really. It was narrated by Woody Harrelson, free of charge, who did a fantastic job on it. Of course I can't give any speciic links, but it is widely available for download on Torrent sites.
here is a really really good documentary on marijuana: in pot we trust http://tvshack.net/documentaries/In_Pot_We_Trust live stream it takes the form of a tarantino movie basically, showing different paths of people (lobbyist, DEA, medicinal marijuana patients) all meeting up to the end showing the actual voting on a medicinal marijuana bill i highly reccomend
If you want to download In Pot We Trust, just go here: http://www.phillynorml.org/videos/aaf-ipwt.avi Its alot better than watching it online.
Here are a few other good ones... HIGH: The True Tale Of American Marijuana (2008) HOOKED: Illegal Drugs & How They Got That Way – Marijuana, Assassin of Youth (2007) MARIJUANA NATION – National Geographic Explorer (2008) THE UNION: The Business Behind Getting High (2007) All of these are superb... although I give special CUDOS to HIGH for it's injected humor (the narrator/producer is a riot!), and THE UNION... They are all available at Amazon... as-well-as by torrenting...