I found this site earlier today and found it interesting. You paste in a sample of your writing and the site analyzes it and informs you which notable author your style most resembles. They also give you some code to paste into your blog to display the results.
Probably just a means to sell amazon books, but neato just the same. Here's the link: I Write Like
BTW, it told me I write like David Foster Wallace: Amazon.com: David Foster Wallace: Books, Biography, Blog, Audiobooks, Kindle
Whom I've now heard of...