I used to be on ZeroNet, which enabled everything to be P2P: blogs, forums, social networks, text chat, messaging, filesharing, code forges even. No servers, and all accessible with one account.

But it never really took off (& of the few people there, too many were the kind kicked off other platforms IMHO for good reason). But I still hope P2P solutions will rise up, so we can avoid all the issues involved with depending on servers. Good luck with PeerBox!