So I haven't made a prediction map yet, but one kind of fun thing to think about is the strong, negative correlation between Romney's 12' vote and Huckabee's 08 vote. It's a great predictor of how Romney will fare in a given county, and would have almost exactly nailed the Florida map. For the statistically inclined, the r^2 is .8
I wrote a blog post on it here, and there's also a map of how that would play out in Michigan.
http://electionate.com/2012/02/19/predictions-revisited-the-ghost-of-huckabee/