Bittorrentgasm
As anyone who knows me can probably tell you, I’m exceedingly interested in decentralized networks. As soon as bittorrent came out I’ve wanted to produce something to further the effort. I was going to make a multiple-download client, but then many came out before I got started. Then, when rumors of a decentralized bittorrent started circulating and more specific talk of eXeem surfaced, I got really excited about a fully decentralized swarming download network. I have decided that I will create a decentralized bittorrent network, possibly as a component of a larger project. I have begun some preliminary design work already and have only a few problems left to overcome (until I can start looking at the next set of problems 
) and I’m really excited about the whole thing.
Anyway, the reason I went off on that tangent was because of this article that does a good job of articulating the decentralized bittorrent idea. It’s worth a read for your inner philosopher-geek.