I'm a senior research scientist in Boeing's Math / Computing R&D center (my Ph.D. is in Computer Science). We have a homegrown 3D CAD visualization application we use for looking at the design of an entire aircraft and it is being used more heavily for helping with assembly and test on the factory floor. A coworker of mine and I just demo'ed our first prototype of using mobile devices (iPhone, Windows Mobile 6.1) as 3D navigation/ object selection & manipulation controllers for the above application (and a few other capabilities our lawyers won't let me talk about).