Okay, here is my map. Honestly, I'm trying hard not to show bias. There are some states a lot of people would give to Romney, that I gave to Palin or Huckabee.
Ultimately, if all three run, which I highly doubt, Romney would win the delegate count. Palin and Huckabee are polling strong, but the places they are polling well in are in the same areas. Romney's strength's are in different places, places that offer a lot of delegate. The popular vote would be extremely close though...
Blue - Romney
Green - Palin
Red - Huckabee