An interesting mixture: how about those PC cards from Sprint, etc that allow internet access anywhere on their cell network? Could these be as easily traceable as cell phones, or would this be more like war-driving, dropping/re-establishing the connection every so often as one moves from one location to another....Hmmm.

EDIT: I think 'The Net' was a cool movie, but only because I wasn't into computers when it was produced, so it seems kinda neat, the "good ole days", I guess....and let's not forget 'Hackers'..."Wow! A 28.8K modem! VGA graphics!" lol