GDC 09: Cool new fluid simulation demo

NVIDIA just released video of a very impressive new fluid simulation demo. It uses a grid-based fluid simulation running on CUDA (written by Jonathan Cohen) that translates and interacts with the car, and is used to advect about 0.5 million particles which are rendered with volumetric shadows. It's running on two GeForce GTX 280s, one running the simulation, and one doing the rendering (but it's scalable). It's amazing to me that this kind of thing was only possible offline only a few years ago, and is now running in real-time.