I've been relatively loyal to Motorola phones until I got my Samsung Captivate...
I initially loved that phone, but the status of their software updates/support, GPS bugs, bizarre reboots, etc... has left me at a point where I'm not recommending this phone. The Atrix is very interesting to me...
Their pricing on the laptop dock is a little out of wack. The processing power of the Atrix should be in the neighborhood of a dual-core netbook (the one i have is $330)... so being a 'brain dead' shell... you are more or less paying $300 for a screen and maybe a battery. I would consider it having $200 value.