It's in Rich Text Format, so I can update it with any word processor. You can save it on the Internet or just keep e-mailing it to yourself.
It's faster to read and update than a PDA and doesn't need batteries, and I always have something to write on.
I've created a sample you can steal and use at http://www.basilwhite.com/todolist.rtf
Basil White - http://www.basilwhite.com