They aren't good:
Despite his being more certain to run than several other candidates, betting markets put Mr. Gingrich’s chances of winning the nomination at 15-to-1 against; those seem like about the right odds for such a parlay.
I fail to see the case for Gingrich. He has no core persuasive skills - especially for those whose votes he'd need to win in a general election. He has a prickly personality. His conversion from callous hypocrite on the personal front to devout Catholicism may be genuine, but it's also a little convenient for some of the holy rollers he needs. He has none of the star quality of a Palin; none of the affability of a Huckabee; none of the executive experience of Romney; less of the theocon cred than Santorum; no more fiscal conservatism than Daniels; and a persona most grew sick of more than a decade ago.
Or am I missing something?