My wife bought this one a little while ago:
http://catalog2.panasonic.com/webapp...l=Toughbook-W5
It isn't tiny but is very small, fits in her purse. And it has no fan so it runs dead quiet. She hasn't had a problem with it at all. My only complaint was all the garbage Panasonic installs. I had to disable a lot of bloat on it. But yeah, it is a pretty sweet notebook. She loves it.
Oh, and hers came with XP Pro. It looks like that one now has Vista.