I might be dreadfully mistaken, as I usually stay away from networking, but is it possible to transfer data (chat, score, saves, etc.) between servers in realtime? If so, it could make for a very fun gaming experience, having a multi-server megaworld, perfect for a gigantic RPG or something (without overloading one server or maxing out the brick limit).
Thoughts? Note that this networking jazz would not have to be completely contained within Blockland itself (but if it could be, that'd be great).