The latest Futuremark 3DMark 11 uses Bullet Physics in both CPU and GPU benchmarks using Microsoft DirectCompute. For more info see this whitepaper.

Check out this recent interview with FXGuide.com: Coumans recently started at Advanced Micro Devices (AMD), having worked at Sony Computer Entertainment in R&D. “At AMD I will continue and expand the work I started at Sony on the open source Bullet physics library.”