Futurballa Writes Like a Guy
I've come across this little gem from Bookblog in a couple of places lately, including About Last Night and All Facts and Opinions.
Just copy and paste a sample of your writing into the Genie, tell it if it is fiction, nonfiction, or a blog entry, and click submit. The Genie will tell you if the writer is a male or female.
Good fun had by all.
Click here to play.