BJ:
I just graduated college so I learned a few ways around buying some of the books they "recommend."
First, try buying your books at half.com. Its a site thats put on by ebay just for textbooks and such. Its like buying from a used bookstore, only one that has everything youll need. Ive never gone there and them not had a textbook Ive needed. They were usually in good condition too. Then, at the end of the semester, instead of selling the books back to the school and getting squat for them, you can turn around and sell them back on half.com and get most of your money back.
Also, if you have classes that have multiple books, or one book and a "lab book" or something, you can usually get away without getting the supplements. After about a year, I realized I never used those and just quit buying them.
Lastly, make friends with someone who is in your major that you might be sharing a lot of classes with. You can usually go in buying books together, especially if you take the classes in different semesters, then you can just trade after the semester and you spend half as much money. Plus, the "updated editions" really dont have anything different in them at all so you can get away with buying an older version for 1/3 the price.
Hope some of this helps you or even some Dads who might be forkin over some dough soon.
Josh