Mojang Releases Minecraft: Pi Edition For the Raspberry Pi
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, Quake, etc. tournament is appealing.
best case, its equivalent to a cheap tablet, minus wifi and screen
700Mhz ARM, 256 or 512 megs of ram
so, it depends what your server is doing, if it sits there with its thumb up its ass most of the time, it might do the job