So now that I've devoured almost every one of his books, usually in a span of 2 days at most, I find that almost all of the books that I used to think were good are now fairly boring when I try to read them again.

So basically, are there any other authors that write in a style that's close to Palahniuk's, or am I doomed to be bored until his new book comes out?

Pygmy, i can't wait. ;D

Check out Tom Robbins. He might tickle your fancy. I quite enjoyed Still Life with Woodpecker. Very different, yet so similar.