Rejoice, worshippers of Tycho and Gabe. The specifications hath arrived for Macintosh, but no word yet on much else. Or am I wrong? See for yourself!. You can also play it on Linux. And all you need is a semi-good PC/Mac and a trivial $19.95! Pilgrims, rejoice!
Update: Here's the complete list of specs, supplied by Wired.