Handheld PC's are big now.  This one looked like the winner for some time and I know many satisfied users, but the new machines with color capability are here, so all bets are off.  This is the one that I use, and it has truly CHANGED MY LIFE.

Check out the neato computers you can buy on line.  That's how I got mine, and I am glad I did.  Thanks to Andrew Barkoff from Dell for letting me know what the company was doing and how I could take advantage of it.  The notebook I got over a year and a half ago is still going strong, and now I will be getting a desktop machine from them that is 4 times as powerful as my notebook!!!  WOW!