We just got back from a matinee, and quite a treat. "Changing Lanes" is that most rare of items: An actual good, intelligent movie that is also exciting enough to be mainstream.
First of all, Samuel L. Jackson is one of the great actors working today, and even Ben Affleck does a great job in this picture. But beyond the action scenes and the intrigue, there are actual moral and ethical issues being discussed, and characters who are made up of more than one dimension.
Shut off the computer right now, and get out to whatever local theatre is playing Changing Lanes immediately!