Well, hopefully I wont get flamed for bumping this, but I feel that I have a legit reason: The latest Update. Some highlights of the latest update are the massive changes to the game engine, including multi core support (great because it primarily runs on the CPU), bugfixes, and the awesome new water shader (example bellow).
If anyone wants to try this game out, I suggest joining the blockland IRC channel once you login to the multiplayer client, this way me or anyone else who is there can help you learn to play (Options->server->perform-> add-> /join #blockland).