For those who are fortunate enough to get the JAM device (it's not offered in the US), Innopocket has released a metal case for it. Here is the info on the case:
The metal case for O2 XDA II mini PDA phone. It is made of 100% anodized aircraft grade aluminum. We design the case to perfectly fit the sleek and sophisticated design of the XDA II mini PDA phone. You get full access to your PDA phone while it is in the case. The interior is lined with neoprene to cushion your handheld from impact shocks. Protect your PDA phone with our innovative form-fitting metal case.
Features: -Light weight aircraft grade scratch-resistant andoized aluminum. -Precision molded case to perfectly fit your XDA II mini PDA phone. -Neoprene lining holds your PDA phone securely in place, protects it against drops, shocks and collisions. -Precise cutouts give access to all vital buttons and functions. -With removable belt clip and post system -Transparent plastic front panel allows screen viewing without opening flip cover.
Compatible: XDA II mini/ i-Mate JAM/ QTEK S100/ MDA Compact