I've got a Dell Axim X30.. LOVE it. It has wireless abilities.. run's on Windows. Very easy to transisiton to, SYNCH's with Outlook, can actually produce documents, spreadhseets and e-mail on the PDA, where I think PALM you can read spreadsheets but you can't make spreadsheets etc.. I have a wireless network in my house, and with three kids and one computer it gets hectic. NOW one kid takes my PDA and can sit on the couch and chat with his friends while another is on the PC and playing games. It has a SD card slot for expansion and storage, and you can actualy buy games on SD cards to play on the computer.. 625 Mhz Processor 64 MB RAM Basically does everything a desktop computer does in teh palm of your hand.
Stared playing with the handwriting recognition KEWL.. no more graffiti, it recognizes about 95% of what I write on the screen.. No matter what you buy, make you sure you purchase screen protectors.. worth EVERY penny.
Dell Axim starts at around $200, and just like any other computer from Dell you can add accessories, GPS, Camera, Wirless.. etc.. mine ended up in the $450 range.. I've dropped it a couple of times, been caught in the rain.. and my kids use it CONSTANTLY .. no problems yet.
I sync it with both my home computer and my computer at work..