I believed this was called The Thai Warrior, or something like that in other countries. I loved this movie. Tony Jaa does all his stunts, the fighting looked pretty tough, no wires and cg effects. Before this movie I've never heard of him, but I'm definitely checking out for him. Go and see it if you haven't yet.
There must be a thousand threads on this by now If you look on the front page of the movies forum, you'll see a huge one which mod Elhiggito kindly merged. Here's the link