1. See webpage http://www.nvidia.com/object/cuda_apps_flash_new.html for examples of implementations using GPGPU (it includes the speed-up factors). Moreover, there are some attempts to simulate soft-body systems in real time, which is possible only due to GPGPU.
2. See webpage http://www.nvidia.com/object/cuda_home_new.html official review of the CUDA technology. In particular the most important documents are the Programming Guide and NVIDIA CUDA C Programming Best Practices Guide.
3. See http://www.amd.com/stream.
4. Recombination of an atomic system in one, two, and three dimensions in the presence of an ultrastrong attosecond laser pulse: A comparison of results obtained using a Coulomb and a smoothed Coulomb potential