We've just pledged to buy a share in a new community farm in South London. Have a look at what they're trying to do here: http://us1.campaign-archive2.com/?u=bd146b8b8f2d241f66bb818f7&id=8f162655f5
They can only go ahead and buy the land if they get enough people who can pledge £1,500 for a share in the farm. If you fancy getting involved let them know quickly. They don't have much time to make a bid!