Second this, regarding user hardware control. It's difficult to trust a device that doesn't have *hard* switches to disable all of the "wireless" features (built-in cameras, microphones, radios). A hard switch for the speakers is important, too, especially for a device you cannot easily remove the battery from (which is my current hard switch of last resort).
(In a somewhat related trend, it's almost impossible now to get flash drives and hard drives with a hard read-only switch. Every time you plug one of these in, you are completely trusting the hardware you plug it into.)
The Xoom itself looks attractive at $450, but at the current price it's a no-go. I'm using a rooted Color Nook instead, which is pretty nice, and at seven inches probably about as large as I'd care to go.