Quinnipiac national GOP primary poll, conducted from Oct. 25-31 (so most, but not all of it was before the sexual harrassment news broke). It shows Cain at 30%, which is tied for an all time high for him in national polls from any pollster:
http://www.quinnipiac.edu/x1295.xml?ReleaseID=1669Cain 30%
Romney 23%
Gingrich 10%
Perry 8%
Paul 7%
Bachmann 4%
Huntsman 2%
Santorum 1%
Cain's at 33% among men and 27% among women. His best subgroup is self-described Tea Party supporters, where he's at 43% and Romney's at 14%.