A customer recommended this laptop. While we don't have one yet, we want one. See Traqmate DU for size reference.
http://www.lotustalk.com/forums/f100/my-new-traqtop-pc-59574/#post1060580
Downsides:
It comes with Linux. You have to buy and load XP.
Battery life not all the great when running XP.
Limited disk space (16 Gbyte after installing XP)
Small keyboard.
Upsides:
Inexpensive.
Weighs under 3lbs!
No hard disk to fail.
It would actually fit in an airline tray table!