Ah I checked, Palm has no memory expansion. I have a Philiph Nino 200, but wouldn't recommend that to anyone, a bit outdated already.
The HP Jornada is very nice, so is the Compaq iPaq. They come with high resolution colour screens and the PocketPC version of Windows CE. It has Microsoft Word, Excel, Outlook and Windows Media Player on it, it's just like a mini version of your PC. Plays MP3, video, lots of memory, expansion possible. Internet Explorer on it as well.