This poll is fantastic news for Romney.
It demonstrates Romney's cross party appeal.
Now, if he is successful in extrapolating this cross party appeal to other swing states, then things will be looking very good for Mitt indeed.
Florida is politically a hybrid state. Northern Florida is truly part of the South in its politics, and the sorts of white Democrats who used to vote for Clinton and Carter (also George Wallace -- that is the clue) have largely gone R in their voting as elsewhere in the South. These people may still be nominal Democrats, but they vote heavily Republican -- or else consider President Obama the 'wrong sort of Democrat'. Southern Florida has large numbers of Hispanic voters, including the Cuban-Americans who used to be reliably R when their only concern was Fidel Castro and would vote for whoever had the most strident anti-Communist message, and other Hispanics who do not have that concern. Many of the northern retirees and those who followed along are nominal Republicans, but they come from the old Rockefeller wing of the Republican Party and can't stand the 'Wallace Democrats'. Florida also has a large African-American population.
Graft Alabama onto Michigan and you have a fair approximation of Florida.