Here's my map:
Hillary-310
Romney-228
In the West the Mormon vote bumps Romney in Utah and Idaho and clinches Nevada for him. Colorado and New Mexico continue their leftward trends. Hillary edges out some victories in the peripheral south but the Katrina exodus causes her to loose Louisiana. Florida is trending GOP. In the Midwest, Hillary manages to hold on in Wisonsin and takes Ohio and Iowa. Hillary gets a home state bump in New York. Virginia is close but goes to Romney, probably goes Democrat in 2012.
I pretty much agree with this, except Missouri. I think fond memories of her would give Clinton a narrow victory in Arkansas in this scenario, but she is unlikely to win Missouri against Romney.
@rcnj3890, actually, most of these predictions are pretty hackish for the Republicans. McCain or Giuliani would trounce Clinton, but Romney would lose narrowly.