Price of Weed is a new site that aims to crowdsource the street value of marijuana. Users (double meaning!) can anonymously submit information on where they last bought pot, in what quantity, and what it cost. Judging from the Google map, on the homepage, it looks like Americans are paying a little under $400 for an ounce.
So what's the street value of a site like this? Tough to say, though perhaps this sort of information-sharing is a harbinger of a time when pot is a legally traded commodity.