Still Rudy, and personally I'm more sure of my vote this month than last month, where I nearly switched over to Romney.
Personally, I think that Huck helps Giuliani out. If Romney is still competitive in IA but loses, I think he gets the major hit in NH, not Rudy. Michigan being returned to the 15th also helps Rudy out, as, if Romney takes a hit from IA (and even further, NH), Rudy can take MI and put himself in a very good position to hold through Super Tuesday. Even should he lose SC, he's got FL in the bag, still.
Essentially, Huck decreases Romney's chances more than Giuliani's chances, without Huck passing Giuliani himself.
If you replace "Rudy" with "McCain" everywhere, this isn't too bad...