Even though we already own The Maw, we decided to give it a try -- so deep is our love for you -- and, sure enough, we successfully redeemed a code for From Dust. Those wishing to hop on the XBLA God-simulator bandwagon a little early can do so right here.
Update: Reader Tom pointed out that Insanely Twisted Shadow Planet and Fruit Ninja Kinect are also available early from the MS Store, and also come with free copies of The Maw. Want proof? Here you go: ITSP, Fruit Ninja Kinect. We're going to look really foolish when Microsoft takes those down, but they both work as of right now.
Update 2: Microsoft has pulled both Insanely Twisted Shadow Planet and Fruit Ninja Kinect from the Microsoft Store.
[Thanks, Andy K.]