UPDATE: It's worth noting the latest polling from Alaska Survey Research, showing the positives & negatives among the top-4 candidates.
Claus: 36% pos, 23% neg = (+13)
#1
:-)}
Begich: 42% pos, 41% neg = (+1)
#2
Gross: 35% pos, 46% neg = (-11)
#3
Palin: 36% pos, 59% neg = (-23)
#4