If more proof were needed that the rich are different, it could be found on aSmallWorld.net, an invitation-only social networking site.

“I need to rent 20 very luxury sports cars for an event in Switzerland on the 6th September,” a member wrote recently on the Forum, aSmallWorld’s popular nucleus. “The cars should be: Maserati — Ferrari — Lamborghini — Aston Martin ONLY!”

Another announced: “If anyone is looking for a private island, I now have one available for purchase in Fiji.”

Founded four years ago, the site, promoted as a Facebook for the social elite, has grown from about 500 members to about 150,000 registered users. At a time when Christina Aguilera has 466,550 MySpace friends, aSmallWorld has attempted to create an Internet niche by cultivating an air of exclusivity.