It's a hilarious list to read though -- some of them are so ridiculous and some you wonder why anybody would want them at all. Who would pay money to drive around with BUTTHED, HOGNUTZ or PENUS on their car? I guess they're pretty funny because they're so absurd, but I dunno.
Yahoo did something awesome with the list, though: they made a little app where you can type in a vanity plate and see if it's banned. Enjoy! (The first ones I tried, naturally, were BUTT and FART. Both banned, though BOOGER is ok!)