I recently flew with a guy who'd been out on LTD for almost 20 years with Type 1, and he was back. We had a long conversation about it and he was totally open about when he got it, managing it etc. The stuff the FAA makes him do to keep his medical is pretty crazy, but it didn't seem to phase him one bit, he was just happy to be back. His return to work can be singularly attributed to technological advances in insulin pumps, glucose monitoring in real time, and his iphone! Pretty amazing stuff.