http://www.lifeprint.com. This is an entire class in ASL with lots of stuff. There's books, newsletters, an ASL dictionary, Deaf jokes and much more. Definitely worth looking into.

ASL Browser. This is a video ASL dictionary from Michigan State University's. It has more than 2500 video signs covering 4500 English words. Better yet, buy a small dictionary to carry around with you.

Link to a List of Links. This is probably the ultimate links page for the ASL enthusiast.

ASL Literature Page. This page has videos of short stories told in ASL. Not a bad place to practice.

Fingerspelling practice. This is a great tool to improve your ability to read fingerspelling.