Making the rounds today is a utility written by Coding Robots that analyzes your prose and then matches it with famous (note: not necessarily someone you like) authors.

Among the blogosphere outside Science 2.0 I have seen 4 Margaret Atwoods, 3 Dan Browns, 2 Stephen Kings.  Only 1 Asimov but I bet his was all about robots or something.

Who did I get?   Dan Brown, which is sure to make my wife chuckle, since I read the first hundred pages of "The DaVinci Code" and had two notebook pages filled with blatant errors or inventions he made even with my limited grasp of religious history, and then gave up.  

Sorry folks, no Chuck Palahniuk or Pynchon seems to be possible, at least if you have any science at all in your article.

Give it a try: I Write Like...