I will vote for her over Romney, Gingrich, Huckabee, or Pawlenty. If she picks any of those as a running mate, she will have already lost.
I think there is a good chance she could pick Romney as a VP candidate, for the same reason Reagan choose Bush.
In 1980, the GOP elite/insiders were so upset about Reagan getting the nomination that the were close to pulling another 1964 Goldwater type walkout and leaving Reagan hanging. Reagan put Bush on the ticket to keep them in tow.
With Romney as the VP candidate, there would be no question that Palin would get 110% support from the GOP establishment. Otherwise, we would see the GOP old-guard do to Palin what they did to Goldwater in ‘64 and several tea party backed candidates in 2008—attempt to undercut their own nominee.