FedEx is online with CASS. Unfortunately, your company has to provide digital pictures to the CASS database in order for you to JS on FedEx. Currently, only AA, AA eagle, Continental, and United have digital pics. Most airlines only require your passport but of course FedEx has to complicate things. Union is working on it. Anyway, I had the pleasure to ride in an AA cockpit the other day from LAS to DFW. No problems and everyone was fantastic. It's appreciated!
Just a tip. If the ticket agent enters your data in the CASS system (ie. your employee number, code (FX for FedEx)) and the computer return says you're not in the system, have them hit the "enter" button again to resubmit. It should pop up fine after that. I ran into this situation 2 out of 2 times so far.