It looks like Markus “Notch” Persson will be pitting Minecraft against The Elder Scrolls V: Skyrim, as the building MMO will be officially releasing on November 11, 2011 - 11/11/11.
According to Joystiq, Persson notes that the “full version” of the game won’t differ significantly from its current beta. Which means there won’t be a real release - after all, 1.8M users have paid $33M USD already to play the beta - but just a removal of the “beta” tag.
Persson adds that the development team will continue to update the game with new features after the official release.