Manic Digger is an open-source implementation of block-building games as made famous by Minecraft. Manic Digger aims to be a generic platform ontop of which you can create your own game-types and scenerios. Through server-side scripting, any type of block-building game should be possible.
Contains the Files required to alter the game for an 8 player online limit
this is a patch for version 0.2a (to patch to 0.2b). There has since been a full version release which includes the updates of this patch as well as further progress (0.3 version was made available 13th Jan 2011)
watch Manicdigger.blogspot.com for further news.