I think Huckabee would be a pretty good nominee. He should be the front runner along with Palin if McCain were to lose the election.
If Huckabee becomes a front runner than so would Romney. Love him or hate him he did come in second in popular votes and an arguement could be made that he was in second pace because of that. Romney also had a broad appeal, unlike Huckabee who came in 6th or 5th among Non-Evengelicals, When he was still in the race Romney did better in the South(Hucks base) then Huckabee did out West(Romney's base). Granted I am a little biased but a non-biased opinion who have to have both if one is included.