I recently watched "Skin" with Lee Varis. If you think you know Photoshop, think again.
Interactive with a handpicked small audience, questions fielded from the Internet, this is a great way to improve your Photoshop and photography skills. You get to watch the entire workshop for free, and then if you like it, you are able to download it for reasonable price. A great way to improve. www.creativelive.com. Click on the "Live" button to see what is currently playing. They also have a calendar of events so you can see what is coming up.