I find myself drawn more and more to Parkour. My climbing and more recently my gymnastic and martial arts background should (I guess), give me a pretty good basis. Plenty of drunken escapades on the building of Nottingham in my youth (late 80s), give me a bit of 'previous' not too far removed from modern Urban Freeflow.
Whilst on the Urban Freeflow site I came across this article on training. It is very similar in places to my own workouts and as a general approach to training, I cannot fault it. In addition there is a recommended exercises post.
Well worth reading. Both posts were produced by Will Wayland who has runs a blog here.
As an aside, at the bottom of the recommended exercises post is a list of Parkour Techniques that are pretty usefule. This guy below demonstrates a handstand, that is pretty rock solid. From a gymnastic perspective is technique is a wee bit dodgy - given the big arch in his back, but his dismount is cool-as!