For anyone who is interested in learning Photoshop, YouTube (and other video sites) can be a good source of free learning that you might not have thought of.
Both YouTube and MetaCafe have a lot of photoshop video tutorials and while not all are the best quality video, the ability to see techniques in action with video is great for quick learning.
Here are just a few of the video Photoshop tutorials unearthed in You Tube and a few from MetaCafe as well.