Gotta love ICE!
It's so fast/easy prototype a custom deformer (or whatever) in it, it's so powerfull... I think just because of that Softimage is one of the best 3D softwares in the market... a true life saver.
I can't wait to start working on the rigging framework/pipeline for our next project at Kandor Graphics, ICE Kinematics will be our rock star for sure! :)