Florida and Mich. delegates given full voting rights at convention as show of unity. Too little too late?

Spokesman for DNC says by giving delegates of Florida and Michigan voting rights at convention, they hope to solidify their support of Obama. Will Clinton delegates refuse to get on the band wagon and with this, does she still have a chance at the nomination. She picked up 56 delegates in Fla. alone to Obama's 30, or will her supporters still 'revenge' vote for McCain?