Minecraft, the multiplayer, block-destroying game has had a serious DOS attack. Although as yet unproven, it is believed to be the work of the hacker group 'Anonymous'. The servers did go down but are currently back up and running.
Another group, LulzSec, have been finger-pointed too and they are now taking 'site hacking requests'! Their recent attacks include EVE Online and The Escapist amongst others.
Minecraft official release date
Minecraft's official release date is currently November 2011. It is only available as a beta version until then.