Open Season On Open Source?

Ethan Galstad, the creator of Nagios, is the focal point of a general article about open source as a business venture, Open Season On Open Source?, from BusinessWeek.

In 1999, Ethan Galstad was thinking about starting a business with a friend. Among other things on their to-do list was digging up software to monitor their network and flag any problems. They couldn't afford any of the programs on the market, however, so Galstad wrote his own. Almost on a whim, he posted it on an open-source Web site where geeks around the world browse code and download programs for free.