I saw an article referenced on the Wall Street Journal's webpage and found the analysis to be interesting (but that may be because I am a dork). Basically, they use the frequency each columnist uses specific, unique words and then apply that to individual columns to see if they can determine the author of the different columns.
I think the most interesting part was the list of the top words and adjectives/adverbs used by each author.
What's better than Superman and Batman fighting? Superman and Batman teaming up! (backofthehead.com) They're bosom buddies. And they meet Joe Chill. And there's a surprise at the end that won't leave you... cold.