This is really clever. I'd love to see the web shift to a decentralized model like this. I don't know enough about bitcoin to understand how this would perform under load. I'm assuming that bitcoin scales the same way that any p2p network scales? So the more requests there are for a resource, the more peers that are serving up that resource?
Especially in jurisdictions that criminalize, or are considering criminalizing (see: the EU), serving links to illegal content. Surprise, because someone put a torrent hash into the chain, it's illegal to mine or own Bitcoin.