Dug up this thread because these guys from the Netherlands got their hands on a dev kit and show it around a bit. It's in Dutch though, and there's not much games shown or anything.
OUYA Hands-on
Some surprises in the hardware department (at least to me) were how small the actual console is and there's a little touch screen in every controller which can double as a mouse for browsing and stuff.
I'm not convinced, but who knows.