Is it something in the air? I saw it last night too! Just a whim; it was playing in a nearby theater that has a really huge screen. It was considerably better than I expected (but my expectations were rather low.) It struck me as a good popcorn movie, one that you can relax with and just sit back and enjoy the ride, if you'll pardon the expression. The jazz connection was interesting to me too. In fact, I enjoyed the jazz segment of Collateral more than the jazz connection in The Terminal, probably because in the case of the former, I didn't know it was coming, whereas I'll admit that I saw Terminal just to see a few seconds of Benny Golson on the big screen.
The Tom Cruise character, Vincent, actually seems have a real appreciation and understanding of jazz, and knowledge of its history too, at least with respect to Miles Davis. This was one of the best scenes in the movie, for me, when they're in the jazz club. Max (Jamie Foxx) says, "I never gave jazz the listening time," or some such, which makes it sound as if jazz is some difficult, esoteric thing that takes a lot of effort to get into. This is a common misconception, unfortunately, so it seemed like a realistic (if depressing) thing for the guy to say. I felt like telling him that it's only difficult if you START with Ornette Coleman! Anyway, the jazz section was a nice plus, for me.