I don't know if it would be one network, though. You'd definitely need to be able to look up data, obviously, so you could talk to the network to do that, but I think trackers would be a good way to solve some of the issues of IPFS, which means that maybe each tracker had their own "network".

I've wanted something like this many times, though, where I could help keep the IA online. If I could tell my site's visitors "help keep this site online, please donate 1 GB", it would be great.