hypnosec writes "Mojang has officially released Minecraft: Pi Edition for the credit card sized Raspberry Pi. Back in November, Minecraft was ported to the Raspberry Pi, and it was revealed that Mojang would release a free version of the game. The game is completely free and is now available for download. Even though the game will carry only a limited set of features, the cost and complexity of building and hosting a Minecraft LAN-party has definitely dropped."
From the looks of it, you should be able to run it on any ARM system that can run Debian Wheezy. More generally, the idea of a tiny box you can just turn on and have a server for a bzflag
, etc. tournament is appealing.