C'mon, Americans love to go over the top when celebrating...The only real difference between this inauguration and previous ones was the amount of people who showed up for it.
The inaugural balls are privately funded. Many charge admission.
The Dow went down mostly because the Royal Bank of Scotland announced the worst loses in history of any British company and the British government has to respond with a bailout. There were fears the banking community would continue to collapse. (Good news by IBM has lifted the Dow today.)
Obama is working towards a complete hybrid fleet for the White House by the end of the year....unfortunately, the Secret Service hasn't been able to find a hybrid vehicle strong enough to protect the President. It's in the works. (The Presidential limo is a custom made vehicle from the ground up and is more like an armored personnel carrier disguised as a car.)
If you remember, Jimmy Carter tried to do away with all of this and be seen as an "average guy." The American people don't want that. They want to look up to a leader--someone they see as strong and powerful. Not the guy next door.