"Seth Godin may be the ultimate entrepreneur for the Information Age," Mary Kuntz wrote in Business Week nearly a decade ago. "Instead of widgets or car parts, he specializes in ideas -- usually, but not always, his own." In fact, he's as focused on spreading ideas as he is on the ideas themselves.

After working as a software brand manager in the mid-1980s, Godin started Yoyodyne, one of the first Internet-based direct-marketing firms, with the notion that companies needed to rethink how they reached customers. His efforts caught the attention of Yahoo!, which bought the company in 1998 and kept Godin on as a vice president of permission marketing. Godin has produced several critically acclaimed and attention-grabbing books, including Permission Marketing, All Marketers Are Liars, and Purple Cow (which was distributed in a milk carton). In 2005, Godin founded Squidoo.com, a Web site where users can share links and information about an idea or topic important to them.