Manju Hegde, Nvidia VP for PhsyX and CUDA Marketing and previously CEO and co-founder of PhysX inventor Ageia prior to its Nvidia buyout, has gone to AMD.
While the tech industry often sees people move back and forth between rival companies, this is potentially a big win for AMD, who are in need of some big hitters to convince industry bods to adopt its "open" physics and GPGPU technologies.