I've just ported Friq from the GP2X to the Sharp Zaurus. It'll run on 320x240 and 640x480 models.
I've built an ipk for the Sharp ROM but the source is available and it would be very simple building it for something else.
I've tested it on my SL-5500 but have simulated 640x480 on my PC.
Please download it from here -> http://thunor.org.uk/friq
Requirements are libSDL and libSDL_mixer, available from my site too if you don't already have them.
I welcome your feedback.
P.S. I'm using this old account because my new one won't let me start a topic.