Editing Images with Adobe Photoshop

Adobe Video Workshop
http://www.adobe.com/designcenter/video_workshop/
Free online video tutorials for Adobe CS3 products, including Illustrator.

Includes the following interactive video tutorials for Photoshop:

• Using Layers
  
• Making and refining selections
  
• Retouching and repairing photographs
  
• Using the animation palette

Catalyst Tools Workshops - Online Curriculum
Developed for students, by students at the University of Washington, these tutorials walk you through how to use Adobe Photoshop.

• Adobe Photoshop 1
  http://catalyst.washington.edu/help/graphics/photoshop/index.html
• Adobe Photoshop 2
  http://catalyst.washington.edu/help/graphics/photoshop2/index.html
  
• Adobe Imageready (for buttons and animations)
  http://catalyst.washington.edu/help/graphics/imageready/index.html