Ubisoft's From Dust will be releasing on the 27th of July according to Microsoft, who have just announced the order in which their Summer of Arcade 2011 titles will release.
From Dust will also release on the PlayStation Network, but all of the other titles in the Summer of Arcade are Xbox Live exclusive. In order of release, they are: Bastion, From Dust, Insanely Twisted Shadow Planet, Fruit Ninja Kinect and Toy Soldiers: Cold War.
Microsoft also stated that if you buy all five titles, you'll get a sixth title free: Crimson Alliance. This game is due for release on the 7th of September and would normally cost 1200 Microsoft Points.