"not a typical Arduino board. It’s a Linux computer running on a Sitara processor, plus a full Arduino Leonardo. It builds upon the experience of both Arduino and BeagleBoard.org, combining the strengths of both."
You'll also have input in the final production version. The testing period is scheduled to be about 3 months and the final version should be out later this year.
Check out the Adruino Tre Developer Edition at booth #204 at Maker Fair this weekend.