Let's name this rig 'Nick' after its creator
Nick Zuccarello (www.nickzucc.blogspot.com).
It's
is probably fully compatible with Blender 2.57b in the sense that it
does not seem to have any FK/IK switching problems - the feet are
always IK (they don't follow the body's motion) and the hands are
always FK (they do follow the body's motion).I've included this
rig because it demonstrates very well how a rig can be given 'soft
flesh' which moves realistically as the joints bend. Download it
HERE.

This rig was automatically rigged (given a skeleton) using
BlenRig by Juan Pablo Bouza. BlenRig is licensed under a
Creative Commons Attribution-ShareAlike 3.0 Unported License. Based
on a work at www.jpbouza.com.ar
.