Slate has a story up about which action movies stuntmen think are most impressive. The list is great, and has a few things I've never seen. Read the story to get the whole explanation, but two pieces of impressive action movie-making I think should be added are the chase at the beginning of Casino Royale (the new one) and something (anything) involving Jackie Chan.
I think Jackie's stunt cred is harmed a little by his affable nature and his willingness to be in Rush Hour 3. But action scenes don't get much better than this from First Strike: