I spent my lunch hour on the first attempt:
After finishing, I realized I hadn't included any latches or insignia, which Isaac hints at and in some cases compeltely renders. I didn't finish rendering the face, which bugged a couple of my colleagues, and I could use some more variation with line weight. Got some stuff to think about for my next one. The pose is a paint-over from posemaniacs so I could just focus my brain on rendering instead of proportions.