Kevin Ham leans forward, sits up tall, closes his eyes, and begins to type -- into the air. He's seated along the rear wall of a packed ballroom in Las Vegas's Venetian Hotel. Up front, an auctioneer is running through a list of Internet domain names, building excitement the same way he might if vintage cars were on the block.

As names come up that interest Ham, he occasionally air-types. It's the ultimate gut check. Is the name one that people might enter directly into their Web browser, bypassing the search engine box entirely, as Ham wants? Is it better in plural or singular form? If it's a typo, is it a mistake a lot of people would make? Or does the name, like a stunning beachfront property, just feel like a winner?

UPWARDLY MOBILE: Kevin Ham's kitchen-table business now inhabits the 27th floor of a skyscraper in Vancouver.

More from Business 2.0
100 fastest-growing tech companies

Two centuries of contrarian thinkers

The (less) lonely life of the road warrior
 
Fastest Growing Tech Companies
Current Issue
Subscribe to Business 2.0 
When Ham wants a domain, he leans over and quietly instructs an associate to bid on his behalf. He likes wedding names, so his guy lifts the white paddle and snags Weddingcatering.com for $10,000. Greeting.com is not nearly as good as the plural Greetings.com, but Ham grabs it anyway, for $350,000.

Ham is a devout Christian, and he spends $31,000 to add Christianrock.com to his collection, which already includes God.com and Satan.com. When it's all over, Ham strolls to the table near the exit and writes a check for $650,000. It's a cheap afternoon.

Just a few years ago, most of the guys bidding in this room had never laid eyes on one another. Indeed, they rarely left their home computers. Now they find themselves in a Vegas ballroom surrounded by deep-pocketed bankers, venture-backed startups, and other investors trying to get a piece of the action.

And why not? In the past three years alone, the number of dotcom names has soared more than 130 percent to 66 million. Every two seconds, another joins the list.

But the big money is in the aftermarket, where the most valuable names -- those that draw thousands of pageviews and throw off steady cash from Google's and Yahoo's pay-per-click ads -- are driving prices to dizzying heights. People who had the guts and foresight to sweep up names shed during the dotcom bust are now landlords of some of the most valuable real estate on the Web.

How to make money without really trying

The man at the top of this little-known hierarchy is Kevin Ham -- one of a handful of major-league "domainers" in the world and arguably the shrewdest and most ambitious of the lot. Even in a field filled with unusual career paths, Ham's stands out.

Trained as a family doctor, he put off medicine after discovering the riches of the Web. Since 2000 he has quietly cobbled together a portfolio of some 300,000 domains that, combined with several other ventures, generate an estimated $70 million a year in revenue. (Like all his financial details, Ham would neither confirm nor deny this figure.)

Working mostly as a solo operator, Ham has looked for every opening and exploited every angle -- even inventing a few of his own -- to expand his enterprise. Early on, he wrote software to snag expiring names on the cheap. He was one of the first to take advantage of a loophole that allows people to register a name and return it without cost after a free trial, on occasion grabbing hundreds of thousands of names in one swoop.

And what few people know is that he's also the man behind the domain world's latest scheme: profiting from traffic generated by the millions of people who mistakenly type ".cm" instead of ".com" at the end of a domain name.

Try it with almost any name you can think of -- Beer.cm, Newyorktimes.cm, even Anyname.cm -- and you'll land on a page called Agoga.com, a site filled with ads served up by Yahoo (Charts, Fortune 500).

Ham makes money every time someone clicks on an ad -- as does his partner in this venture, the West African country of Cameroon. Why Cameroon? It has the unforeseen good fortune of owning .cm as its country code -- just as Germany runs all names that end with .de.

The difference is that hardly any .cm names are registered, and the letters are just one keyboard slip away from .com, the mother lode of all domains. Ham landed connections to the Cameroon government and flew in his people to reroute the traffic. And if he gets his way, Colombia (.co), Oman (.om), Niger (.ne), and Ethiopia (.et) will be his as well.

"It's in the works," Ham says over lunch in his hometown of Vancouver, British Columbia. "That's why I can't talk about it." He's nearly as reluctant to share details about his newest company, called Reinvent Technology, into which he's investing tens of millions of dollars to build a powerhouse of Internet businesses around his most valuable properties.