Another interesting read, this time from Insomniac regarding their new igPhysics system.
Introducing SPU shaders:
http://www.insomniacgames.com/tech/articles/0907/files/spu_shaders_introduction.pdf
Benefits of SPU Shaders to igPhysics
● Pipeline well defined and completely SPU-driven
● SPU processing completely asynchronous
● Data well-organized and well-defined.
● No (or minimal) PPU intervention