The good folks at Ajnag (that's ganja spelled backwards), an online forum catering to the marijuana-reform community, have produced an iPhone App that helps patients track down cannabis buyer's cooperatives near them.

If you live in a state that has legalized the use of marijuana for medical purposes (like California and 13 others), this app will be incredibly useful to you. If you are not as lucky, the app also gives you tips on how to advocate for medical marijuana reform laws in your state.