Hmm, this could be possible. I think you would need one server to send whatever happens on it to a webserver and then have another server periodically check to see what new bricks it needs to create. If the regular hosting server hasn't sent a tick every minute or so, you'd assume it crash and the second server would start pinging the master server, or perhaps just turn off a password :P As long as you keep sending updates from the original server, the second one should stay updated, although you can only do so much, I'd just send when a brick is created or destroyed.
