Some of the latest polls look good for McCain.
Rasmussen Reports has McCain at 47, Obama at 44.
USA Today/Gallup has McCain at 48, Obama at 47.
The AP put out a poll with Obama 51, McCain 41, but it put out another poll at the same time with Clinton 48, Obama 43 while McCain has consistently lead Clinton for weeks, so I doubt its reliability. The sampling consisted of 48% Democrats, 37% Republicans as well.
RealClearPolitics - Election 2008 - Latest Polls
Interestingly, if Obama is the nominee, it appears that Florida will not be a swing state if current trends hold up. It is solidly in the McCain camp for now.
Rasmussen on 2/18 has McCain 53, Obama 37, whereas it's McCain 49, Clinton 43. Obama's already lost Florida due to his stance regarding talks with Cuba's leader and his position on seating Florida's delegates, in my opnion.