Games for Embedded Linux.
Quake on the Zaurus with Sharp ROM
It's slow and currently buggy. Download the Quake ipk and data ipk and install them on your Zaurus, if you have space. People have had problems running it from the launcher using the Quake icon in the 'Games' tab.
You can run it from a command line with:
quake -nosound -width 240 -height 200 -basedir /opt/QtPalmtop/quake/data
It will run, but slowly.