I saw a teaser ad for RetrovsMetro.org in the Post today contrasting Michael Moore as “metro” and Mel Gibson as “retro.” A quick visit to the site didn’t answer any more questions, but I was intrigued. Apparently, this is a teaser for a new book by John Sperling that casts the political divide (read: red states vs. blue states) in the U.S. in terms of “retro” versus “metro.”