I recently purchased one of the folding portable keyboards for my Palm m500. That purchase was one of the best investments in productivity that I've ever made. So far I've used it for the following:
- Taking Class and meeting notes using the Thought Manager outliner.
Processing my "In" while I'm away from my desk (entering actions, projects, appointments, etc.)
Keeping a journal of work I do at client sites using DayNotez.
Keeping a personal journal in DayNotez
Entering expenses in the expense app while I'm on the road.
A laptop would be overkill for me, not to mention that I can't fit a laptop into my shirt pocket. The portable keyboard has turned my Palm into just enough laptop for me. FYI.