Those look really nice! I can't wait to try a photo like that, they just look so unique. Did you use a VR lens as well as using a tripod? I would have thought that even a weighty and sturdy tripod would have moved quite a bit just in the back seat, and the dashboard seems to be superbly crisp.
tamiyaguy: I had the VR off on my lens when I took these shots. I was also worried about the camera shaking since the tripod wasn't that sturdy, but surprisingly it didn't move that much. I did make sure to have a friend, though, in case the tripod would have fallen.