Following the recent discussions around the purchase of jobs.com.au and the resulting owner I was very interested to read about the activities of Kevin Ham king ping domainer.
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.)
If you have any interest at all in the domain name business as a buyer or seller you should read the article.