I found this list of commonly banned classics. I'm proud to say that I've read many off that list and found them to be enlightening and inspirational (and seriously? Most of the books I've read off that list I read in early highschool!)
To celebrate banned books week, I'm going to finish Beloved by Toni Morrison this week. I started it a few months ago, but other books got in the way of me finishing. And I think I'll request 1984 from the library. Sadly I haven't read that one yet even though many of my classes at CU referred to it.
And this is pretty nifty too: Map of Book Censorship