It’s day one of the Miami Grand Prix — a full two days from the race itself — but the well-heeled and famous are lined up outside the track running around Dolphins stadium. The tickets to the Miami International Autodrome may have cost up to $6,000 each, but they had sold out weeks before. As I watched Bethenny Frankel , of Real Housewife’s of New York fame, struggling with her pass into the track, it hit me how much things had changed for the sport. Maybe this is hard to believe, but I’d been