I've got a 2004 Mazda3 and I can tell you that it doesn't have a line-in. I wish.

I remember about 10 years ago I was doing a co-op stint at a division of a large company doing a mix of programming and system administration work. At some point, I found myself in the company of the head of the division after having just solved some dinky little problem with his PC. There was another guy in the room at the time and after I worked my magic the division head looks over to the other guy in the room, points to me, and says "Our vo-tech guys really do a great job".

Interesting. I was on vacationing in London 2 years ago and decided to snap some casual photos in the Underground while waiting for my train. A police officer noticed me take the picture and only told me that the use of flash was not permitted. She didn't tell me that I could not take pictures (no tripod was being used).