Matt Mullenweg is officially the CEO of Automattic. Please note the double "t"--as in "Matt." But he's really the guy who brought WordPress to the world and oxygen to the blogosphere.
You can see the first half of this Webware interview here. Matt explains why WordPress is open source but his antispam kismet isn't. He discloses the catalytic role his mother played in his software development. And he talks about blogging in places where the government is out to get you. The second part of the interview will be available online soon.