The domain name game is still a very viable money maker according to the article by CNNMoney. With last year's sale of Business.com for US$345 million from the seller eCompanies who originally paid US$7.5 million for the domain name in 1999 from a seller who bought the domain name for US$150,000, it would appear that domain name game is still going strong.
According to the CNNMoney article:
Domain names often sell for thousands of dollars into the many millions. In 2006, diamond.com sold for $7.5 million while sex.com sold for $12.5 million. Casino.com sold for $5.5 million in 2003. Computer.com sold for $2.1 million last year. In all, 33 sites have sold for $1 million or more, according to research firm Zetetic.
There are also companies which buy and sell domain names and offer various services for domain name buyers. Companies such as Demand Media and Oversee.net have made hefty profits from the domain name business. The article goes into depth to describe the type of business and the monetary figures of the companies' investment and profits.
Source [CNNMoney]