Several solutions exist for creating your own little mini-P2P network among trusted friends, but the Prague-based AllPeers, which is apparently launching in beta form sometime today, uses a FireFox extension and leverages BitTorrent on the back-end to make set up and private sharing easier than ever. You won't even have to convince your friends to install a separate application, as I had to when testing the original version of the now-Sony-owned Grouper (it was originally a private audio sharing app).
