Well, Freakonomics is finally on sale. It should be in most bookstores today, and is ready to ship from Amazon.com, bn.com, etc. The good news is that the book is already in a fourth printing. The bad news is … well, there is no bad news, not yet at least. Early reviews are excellent. On Slate, the 2nd portion of an excerpt has just been posted. On Amazon, the book is No. 2 on customer wishlists. The blogs, too, are full of Freak-chat, including the great Kottke, who presents an interview with Steve Levitt. Another very nice interview is archived on NPR. And then there’s this very weird piece of synergy: the publisher of Freakonomics is William Morrow/HarperCollins, which is part of News Corp., which also owns Fox, which on Wed., April 13, at 8:30 p.m. EDT, is airing a new TV show called Stacked, which is set in a bookstore, which apparently features a poster for Freakonomics (behind the coffee bar, apparently, next to the newsstand).