From Skunkblog, a map of cannabis laws around the world.
(Note that the state of Massachusetts recently decriminalized possession of up to 1 oz. of marijuana, so color that one in blue as well.)
Classification of countries on this map which I find somewhat surprising:
1. Norway, Sweden, Finland, and France
Meanwhile, the United States seems to be marching inexorably towards broad-scale decriminalization. A recent CBS/NYT poll found that 41% of Americans think it ought to be legal, campered to 34% who thoughts so in 2002 and 18% in 1986. And 72% think that people should just pay a fine for having small amounts of weed, rather than being put in jail. A Rasmussen poll found similar numbers, and the highest support for legalization among young people. As with legalization of gay marriage, broad acceptance of marijuana decriminalization would seem to be only a matter of time.