This site is a good way to procrastinate for a little while. It theoretically analyzes your writing to see what famous author you write like, but I think it just spits out random names. My last few posts got Dan Brown (really? I suck that much?), Chuck Palahniuk, James Fenimore Cooper, Douglas Adams (seriously the highlight of my day), Stephen King, P.G. Wodehouse, H.P. Lovecraft, and Kurt Vonnegut.
I had some fun feeding this thing actual quotes from authors. Adams came back as Adams, but Palahniuk consistently came back as King, and Asimov came back as Jane Austen.