We recently had some amazing GPU CUDA programming webinars at Lockheed Martin taught by NVIDIA that are now available on YouTube. Enjoy them! They were chock full of really useful GPU programming information.
1. Intro to GPU computing: http://youtu.be/hlN_JCx6QoQ
2. Drop-in acceleration using libraries: http://youtu.be/TyRMpi1wuhk
3. Accelerating Code with a CUDA Enabled Language: http://youtu.be/mdUhtsGzkvY
4. Profiler led optimizations of CUDA code: http://youtu.be/MwaiYSt_UOg