Gallup:

If there has been a change of note over the last several months, it has been the failure of Mitt Romney to capitalize on his mini-surge when he won the Iowa straw poll in early August. John McCain has, at the same time, recovered his standing after slipping in August. There has been a slight but steady increase in support for Mike Huckabee, despite his very low name identification. Huckabee has gone from 1% of the vote as recently as May to 7% today, within two points of the better-known (and much better financed) Mitt Romney, and clearly separating himself from the other “minor” candidates competing for the GOP nomination.