A new poll has Mitt in the lead (though technically a statistical tie) in South Carolina:

REPUBLICANS:
Mitt Romney - 20%
Rudy Giuliani - 19%
John McCain - 17%
Fred Thompson - 13%
Mike Huckabee - 8%
Ron Paul - 3%
Duncan Hunter - 1%
Tom Tancredo - 0%
Undecided - 18%

It doesn't seem the two southerners are catching on in the South.