I am using a Palm m505. This is my second Palm PDA as I wore the other one out.

Basic and simple which is all I wanted.

I use it when I travel on business to keep notes on and the battery life is very good if you do not use the backlight facility all the time.

Unlike notebooks if you are travelling by aircraft no one tells to to turn it off as you take off or land and there is still room on those silly back seat tables for the in-flight 'food' tray.

I can synchronise it seamlessly with my notebook and my desktop. The Palm OS software is very compact and there is plenty of free ware available.

As a tip whatever you buy ask the shop for the little clear screen covers. These stick onto the screen and preserve it from scratching and extend the life of the PDA.