Dock to get a keyboard going, running mobile apps on a comptuter screen... what the hell is the point of this device? Throw in the hugely underpowered battery (1900mAh) and a version of Android not meant even for tablet use, then I just don't see 1 and 1 coming together with this device.
BONUS critique: List to yourself the things that the N900 does that the Atrix needs a dock for.