Speaking of Sacha Chua—as I did yesterday—she’s got a nice page on beginner resources for Emacs. Chua tasked one of her assistants to seek out resources for learning Emacs and published the results.
She’s got all the sites you’d expect: the Emacs Wiki, Mickey’s Mastering Emacs, Xah Lee’s Tutorial, and others. But there are also some resources that I wasn’t familiar with so even if you’re an experienced Emacser, you might want to take a look. Definitely a useful resource. If you’re just starting this is an excellent place to find useful tutorials.