Are you referring to http://www.red.com/cameras/
Haven't really been following this stuff for the past 3 years, but I don't have the money to play with these high end digital cinema gear first hand. When I have been luck I have been able to get some access, but it's hard.
Get's lots of good hits on this.
The sensor seems very good, haven't been able to find a detailed of a technical specification as I'd like, considering how high end the camera is supposed to be.
I spent more time studying the Dalsa cameras and sensors.
They don't even say what format the digital cinema output is. Probably camera link .