What would the Web be without sex? Gary Kremen, founder of Match.com, was the first registrant of sex.com and let the domain lie there undeveloped. An enterprising pornographer Stephen Cohen swiped the domain name from him in 1995 when the Web was still the Wild West, and a forged fax could pave the way to profit. Kremen eventually got his site back and sold it in 2006 for $14 million.