Thanks to everyone who attended my webinar today, and thanks for all the positive feedback in the Q&A session. Unfortunately, I was not able to respond to everyone during the 15 minutes available for Q&A. If your question did not get answered, feel free to use the comments section of this blog post to ask your question. You can also ask questions on the MySQL Optimizer Forum.
The slides from the presentation are available here. In a few days, I expect it to be possible to access it as an MySQL On-Demand Webinar.