I think p2p streaming for chunks of a video would be interesting, and I'm sure people are working on it (and p2p in general, not just video). I saw some people

I think p2p streaming for chunks of a video would be interesting, and I'm sure people are working on it (and p2p in general, not just video). I saw some people talking about mesh networks in Bangkok, I'll have to investigate more to see how large it is.