Since this site is oriented toward Artists, I wanted to point out that another site I work on, www.Onezumi.com, has a great selection of Photoshop and Business Tutorials for Artists. Onezumi has done quite a number of art panels and workshops for conventions we’ve attended, and she will have a workshop on using a Tablet PC for art creation at our next appearance at Balticon. (I’ll be a part of a panel there about using Open Source tools to create your website so come on down and ask some questions).
Oh, BTW, Onezumi also has a funny webcomic. :)