Okay, to recap:
From the
WIKI:
Quote:
Simulation
Update PhysX library to version 2.83
NOTE: Due to a change in the PhysX library, actual shape collision results will be different in 2011
Support for CUDA acceleration for PhysX Rigid Body Dynamics (including ICE)
From the
Softimage Features page:
Quote:
Create meshless deformation simulations in ICE with the latest NVIDIA® PhysX® rigid body library. With new support for springs and dampers, you can more easily achieve a wide range of effects, such as jelly-like and plastic deformation. The new library also offers accelerated performance, enabling artists to focus on the creative process when working with dynamic simulations. Even faster performance is possible with the optional addition of an NVIDIA® CUDA enabled GPU.
From the
Planet Softimage blog:
Quote:
Simulation
Update PhysX library to version 2.83
NOTE: Due to a change in the PhysX library, actual shape collision results will be different in 2011
Support for CUDA acceleration for PhysX Rigid Body Dynamics (including ICE)
(identical to the WIKI quote above)
And from the comments on that blog post:
Quote:
Posted by Chinny on Mar 11, 2010 at 08:14 PM
@ Matt Summers
The PhysX update includes new springs and dampers
It also allows for CUDA acceleration for Rigid Body Dynamics (normal and ICE)
From the
SI2011 product brochure:
Quote:
The new library’s accelerated performance can be even further boosted with the optional addition of an NVIDIA CUDA enabled GPU.
And no one has anymore info???/Or does no one care at all???
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ultimate edit/PS - I'm starting to guess it might have something to do with the mysterious change of topic for Mark Schoennagel's presentation at the GDC for Nvidia. According to this document a presentation entitled "Softimage 2011 Enhanced with PhysX" was originally planned at the GDC for Nvidia, but in the end the only presentation mentioned after the GDC was called "Lip Syncing with Face Robot using Softimage 2011" (Link) 
