I've heard of Sanderson's classes but I haven't checked them out myself. Thanks for the links!You guys should look at Writing Excuses. It's a great podcast with tons of solid tips from some of the best in the business.
For people interested in SciFi/Fantasy, it's a crime not to go through Write About Dragons. I don't know what the class they've organized online is like but you should definitely go through all the videos of Brandon Sanderson teaching. For those who don't know, Sanderson is an amazing author (#1 bestselling a few times over) and is probably my favorite author at the moment. Each year, he takes out the time to teach a writing class at BYU to help the next generation. This website has recordings of the classes available.