Holidays and Palmtops - Travelling with Tiny Computers

Computers have been a constant companion on my travels around Australia and the world over the past 13 years. When I refer to computers I'm not talking about lugging backache inducing laptops around.I like a device that instantly switches on and off, that fits into my pocket or a backpack crammed with other stuff without damage, that doesn't need to removed at airport security. I'm talking about a PDA, a palmtop.