Another diagonal pattern method.
Basic tutorial on the pen tool, good for learning Illustrator as well.
Web 2.0 photoshop tutorials.
How to make your own grungy brush in photoshop.
Beautify your buttons.
Possibly useful graphic design tutorial that uses Photoshop and Flash.
Diagonal line patterns and rounded corners (designing, not coding).
How to do all that fancy gradient and reflection stuff that goes with the fancy AJAX and tags stuff.