Okay so I am a psycho and I love first person dungeon crawlers ;p!? Either way they announced a release date for Grimrock in todays friday update and the game should be available in "early april 2012". Based on the dev comments from their new official forums it looks like the game will also be available on steam and at least a few other platforms. Sadly for mac users that version isn't going to be ready for a bit.
Update: Early April 2012 now equates to 4/11/2012