It certainly took awhile, but Barack Obama has finally received the photo-op he's surely been dying for: Yesterday in Florida, Bill Clinton joined him on stage for the first time this campaign. Relations have been icy between the two since Obama took on Hillary Clinton in the primary, but yesterday the Big Dog was unequivocal. ''Barack Obama represents America's future, and you've got to be there for him next Tuesday," Clinton told the crowd. Obama returned the valentine: 'In case all of you forgot, this is what it's like to have a great president," he said, before getting in a good jab at McCain. ''By the end of the week, he'll be accusing me of being a secret communist because I shared my toys in kindergarten.''