Name These Photoshop World Instructors

Just added to this post: Well, we already have a winner in this fun photo contest. Thank you all for playing along - Rick

What do these Photoshop World instructors have in common? Be the first to answer that question and the following question, and I'll send you (if you live in the US) autographed copies of my books:

Question: What are their names? You need to post the answer in the Comments section here on my blog - so I can check the time.

Good fun for all.

Explore the light,