I would advise anyone with a PDA to buy a pen with a stylus built in. The stylus that comes with any PDA is small, awkward, and difficult to use at best and generally a pain in the butt.
But I have found the ultimate quad action pen. There are many on the market that have black ink, red ink, pencil, and a stylus but Fisher has the official space pen version.
What does this mean? In addition to a fine pencil and a wonderful stylus you get two inks that write upside down, in extreme temperatures, on glossy paper, and even write underwater. In addition to these features, pressurized ink makes this pen write incredibly smooth with no bubble or blots. Heck, it even increases the life of the pen. This pen totally rocks!
Check it out at
http://thewritersedge.com/visit.cfm?...er.specialized