Animator Richard Lico of PolyArc has posted a bunch of cool animations and demo material including a great tutorial with a lot of insight into how he works. A lot of nice animation tips and tricks in here...
Animating With Aim Constraints from Richard Lico on Vimeo.
Working in-place or translating for a run cycle? from Richard Lico on Vimeo.
Monk Recoil from Richard Lico on Vimeo.