Don't know if your "give it up" was directed at me or Newt, but Gingrich is obviously doing all the things a would-be candidate does: writes a book and visiting IA and NH, and letting the tenor of the entire interview be "gee are you gonna run?"
I agree. Newt wants to sell his book, that's all, and playing coy about running for the presidency stimulates interest in him and the book. He's a smart guy: he knows he's got WAY too much baggage to ever run for Prez.