I dunno if this is old, but i stumbled upon this over @ MaddenNation and my Jaw dropped to the floor! Hopefully EA & Sega knows about this Groundbreaking technology and put it to use!!
http://www.naturalmotion.com/pages/demos.htm
you'll see a box that says "endorphin Siggraph 2005 Sneak Preview (0:29)
Check out Adaptive Behaviours and Dynamic Blending working in perfect harmony.
(Right-click, Save Target As to download)...do your self a favor and peep this...I know the 360 backflip animation is a little far fetched,but they're on the right track.