I don't know if this has been mentioned before, but I found a website that has free video tutorials on how to use GIMP.
Meet the GIMP! The free video tutorial podcast.
This guy has been doing this for over a year now and I think he's a very good teacher and that he must be pretty cool to keep up a blog like this.
Also, I bought a book today titled "Beginning GIMP: From Novice to Professional"
I'll let people know how it is as I go through it.
List price is $49.99, but I got 10% for Barnes & Noble membership.
I probably could have save a few more bucks because my son works for B&N, but what the heck.