From the Manohla Dargis review in the NYT:
The use of Parkour during several fight scenes is particularly tasty, proving that when cinematic push comes to shove, the French, who originated this ultra-cool rough-and-tumble, which finds performers bouncing like balls from wall to wall, rooftop to rooftop and many hair-raising points in between, are definitely in the coalition of the willing.
More evidence -- at least to my mind -- that the parkour showcase film Banlieue 13 is probably the most influential action movie of the decade.
With LFDH and Casino Royale borrowing from it, I wonder if the Bourne Ultimatum will be next.
If you go to see Live Free or Die Hard, keep an eye out for Cyril Raffaelli (Rand), one of the bad guys. He's the one of the stars of Banlieue 13 and did a memorable small turn in Kiss of the Dragon during a fight with Jet Li. You can see some videos of him in action here.