I'm not sure if this has been brought up before, but Marware just introduced a new case for the Treo which is quite nice. You can check it out at:

http://www.marware.com/TReO.html

I picked this up last week and am very pleased with it. This is actually my second Marware case -- I had one "back in the day" for my very first PDA, a Phillips Nino 510.

David