Ever wonder where the rich and famous live in the United States? If you said New York City or Los Angeles, you wouldn't be far from the truth. But considering those cities alone, which sections are the most posh? A look at ZIP codes, a la "90210," gives insight into both the longtime standard bearers of wealth and the up-and-coming bedroom communities for the country's elite. There are hundreds of possibilities. Here we'll narrow it down to the top 10 based on median home price.