We’ve been fascinated by the sordid world of high-priced escort services for years. Thank Charlie Sheen and Heidi Fleiss for bringing it to the frontal lobe of public consciousness in the nineties, and more recently former New York governor Elliot Spitzer, for raw-dogging it back to front page status. Even ascending network Showtime is joining the biz. Tonight, following the fourth season premiere of “Weeds”, the network will debut “Secret Diary of a Call Girl.” We’d run down the plot for you, but it’s one of those title-says-it-all kind of things. The show is actually an import from the BBC, airing there for a couple of years, and based on the blog of London call girl Belle du Jour (named the Guardian’s blog of the year in 2003). Kudos belong to Showtime for airing the original product and not bothering with an Americanized version. And in this wonderful age of free shit online, you can already watch the first two episodes on the show’s official site.