I know that there has been some discussion on Photoshop, with several people wanting to learn more to improve their skills.
One photography blog that I enjoy tremendously is Chromasia. David Nightingale, the author and photographer for the blog, is offering online Photoshop tutorials.
I am thoroughly enjoying his extraordinarily well written and well put together tutorials.
You can see his tutorials here:
Chromasia Photoshop Tutorials [sponsored link]
He is creating a tutorial per month. When you visit his site, you can see the topics offered thus far. His tutorials are fee based.
Even if you are not interested in the tutorials, you will enjoy viewing David's wonderful photography.
I hope I am not violating any rules here by posting this message. I thought others might want to know of additional Photoshop resources.