Thanks for the help everyone, I found the bulb, but I had to wait until it got dark out. It's one of the rear license plate bulbs, and as luck would have it one of the screws for that little trim piece is stuck into the socket. I PB Blaster'd all three (they all seemed stuck) and let them soak for a few hours, returned and 2 of the 3 came loose. The third "came loose" but it was really the socket part spinning. So I'm thinking I may have to totally disassemble the trunk trim to get to the back of that guy with a vice-grip or something. Ugh.

Same exact thing with one of the license plate screws when I tried changing plates. I manged to pry the plate off over the screw head, then get the vice grips on the socket and tried turning the screw but no dice. Still stuck in there super good.

I'll try the seat movement & electrical cleaner trick soon. That's a heck of a lot cheaper than a switch replacement :-)