Florida went Democratic in 1996. This year black voter registration is way up. Could go Dem again.
Florida was real micro-paper-razor-thin in 2000 and 2004, and I'm sure it'll go down the wire as well on election night.
But as TIS points out, if Michigan becomes a more guaranteed Obama state along with Pennsylvania and Iowa and Colorado and New Mexico and even Virginia...Florida will grow less relevant for that campaign.