Don't know which PDA you guys have but when I got mine (Sony) I purchased one of those tight fit lined aluminium cases for it. Anyway I think they make those for every model out there. What I'm talking about can be seen here.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3017384898&category=27968

Now I can sit on it, drop it (well kinda), throw it into my pack or pocket and be little careless. Works nicely so far. If you high polish a rear of the case it can be used as signaling mirror <img src="images/graemlins/smirk.gif" alt="" />

Matt