I recently acquired a Rhinoskin case for my Palm TX. While in Austin it dropped and bounced around a bit on the pavement. The SD card popped out, and required the use of Ken’s flashlight to locate it. Other than that, there was no damage done to the Palm device. There is a teensy scratch/ding on the bottom of the aluminum case.
So … if you’re looking for a Palm case, this is one that I’d highly recommend.