The last minute poll from Mason-Dixon of 400 Republican LVs is interesting for a number of reasons - notably the Values vs. Leadership dynamic, and the number of Independents for Huckabee (oddly high - more than half of McCain's total). But here's the overall numbers:
John McCain 27%
Mike Huckabee 25%
Mitt Romney 15%
Fred Thompson 13%
Ron Paul 6%
Rudy Giuliani 5%
Duncan Hunter 1%
Undecided (NOT READ) 8%