Clients are plied with everything from free limousine rental (with chauffeur) to matchmaking for their children, health care and even plastic surgery.

ECONOMIST: Private banking in South Korea

This is a revenue opportunity for virtual schools and specialized portals that offer everything from free advice, reading lists, worksheets, books and CD-ROMs to subscription K-12 packages.

CNN: Web puts the home back in homework

Type in your demographic information and you'll see a screen listing your free-sample options -- everything from cleaning products to Harlequin romance novels to toiletries.

CNN: 23 surprising things you can get for free

Khan, 36, started Khan Academy in a closet at his home in Silicon Valley, but with backing from the likes of Bill Gates and venture capitalist John Doerr and his wife Ann, has expanded into a 36-person company serving 10 million students around the world with free video talks on the Internet explaining everything from calculus to chemistry.

FORBES: Move up http://i.forbesimg.com t Move down

The free site offers more than 50 predesigned screens for everything from technical strength to growing cash flow.

FORBES: Pick Of The Stock

With the help of a nationwide network of volunteers -- many of whom have benefited from the group in the past -- everything is free.

CNN: Breaking down barriers so foster kids can find a family

As those boomer households approach the magical age of 49, free of child care expenses and tuition bills, they splurge on everything from second homes to high-tech gadgets.

FORBES: Magazine Article

Mr McCain offers orthodox supply-side solutions, stressing deregulation, free trade, competitiveness and the use of market mechanisms to cure the problems in everything from health care to education to pensions.

ECONOMIST: The presidential election

They are being tapped to talk up just about everything, from movies to milk and motor oil--and they do it for free.

FORBES: Kid Nabbing