Interestingly, Newt v. Obama is rising fast in Rasmussen's Likely Voter poll. Still down 7 points, but that is way up from a few weeks ago.
Romney is no conservative Republican and as such is unacceptable to the majority of conservative voters.
I look at it this way: if Murkowski can win as a write-in in Alaska, that gives the resto of us hope that Gingrich can, too, win as a write in against Obama.