The latest Edwards internal poll shows him still leading in South Carolina amongst "likely" voters. MoE +/- 4.4. (September)
Edwards 23 (23)
Undec. 22 (23)
Dean 12 (7)
Lieberman 12 (8)
Clark 9 (13)
Gephardt 7 (6)
Sharpton 6 (8)
Kerry 5 (3)
Braun 4 (5)
Kucinich 1 (1)
Note that while several independent polls have shown Edwards with the lead, they generally peg him in the mid-teens. His internals are quite charitable. But the trends are interesting in any case.