The great folks over at Photoshop User Magazine have launched an online learning center for the new Photoshop CS3 beta. You'll find great articles, interviews, and video tutorials on the latest technology development. I particularly liked Scott Kelby's Top 10 list and interview with John Nack, the Photoshop product manager.
These guys have good stuff and can be commended for making the bulk of it free to new users. Be sure to check it out and explore new options. You may also want to Join NAPP for access to a wealth of other online materials and training.