Here is something I tried out today after I finally received my Zaurus CF wifi card. I installed SSH on my Zaurus, then logged into my Powerbook. I ran the LCDproc daemon on my Mac from the Zaurus using curses as a display, and lo and behold, my Zaurus was a wireless LCDproc display!
It is hard to see, but the Z is displaying the status of the hard drives on my Mac. It rotates through about 8 screens, displaying the time, system load, etc.