These webinars cover a number of topics, including an introduction to CUDA C, the OpenCL API and performance optimization techniques, presented by NVIDIA DevTech engineers with additional staff online to answer questions.
The full schedule and short abstracts can be viewed here.
You may consider posting a new “sticky” with the title, “GPU Computing Webinars now open for registration”. It is now September, why would I want to sign up for August webinars? Not a big deal as the link is to all upcoming webinars, but I would think you would want your sticky titles to be correct.