Otterbox builds ruggedized cases for the Palm Treo. We have one in-house that we are very impressed with. I think the list price for one of these cases is around $139. Many of my sales teams are using the Palm Treo 700 W these days, and the case seals it up very nicely and will provide adequate protection from most casual accidents such as dropping it on the floor and using it in the rain and protecting it from blowing sand and dust.
Nearly all of MobileDataforce's customers use handheld computers, laptops or Tablet PCs for field data collection, GPS, RFID, barcode scanning, etc. In all cases protecting the hardware investment is a critical issue. Otterbox has created some very useful cases for protecting Smartphones and PDAs that are not ruggedized on their own.