I successfully used my X31 for the entire week at OSCON. With so many Mac Pros and T430s around, I got a lot of stares when I whipped out this 12" 4:3 piece of history.
What's wrong with the keyboard? It's different, but all the reviews I've read have grudgingly admitted that it's actually better (or at least just as good) as the old keyboard.
I'm having huge issues getting over the layout (no space between F key groups, home/end/pgup/pgdown block broken up). I haven't typed on one, admittedly.
Running Ubuntu 10.04 or something, used to run Windows 7 quite well too