Here's a video of the Tab doing Quake 3 w/ keyboard and mouse!
http://www.youtube.com/watch?v=qgOQap3YlxI

A few things:
- The framerate is really, really high. The SGX540 shines in this department -- even Tegra 2 won't do much more than this (as tested by anandtech).
- the cursor on the screen is distracting. Hopefully the software improves and the cursor is hidden.
- it seems as if the mouse clicks aren't registering for firing. I could be wrong, though as I hear clicks, but can't see them.

Anyway, it looks good enough to play! Very enticing.