This looks the business, from what I can make out the screen size is comparable to the C500 - just in landscape mode. But the size and keyboard on this just blows me away, it might not live up to it's hype, because at the end of the day these devices will live and die NOT on what it can do, but on how easy it is to use and the ergonomics of the device.
Either way this is a sensational looking bit of kit that carries on from Moto's Razor:
http://www.motorola.com/motoinfo/product/images/0,,113,00.html
http://www.coolsmartphone.com/news1608.html
http://www.engadget.com/entry/1234000577051874/