Most Americans have a pet. And most Americans are online. So it was pretty smart of Ted Rheingold to start Dogster and Catster, which are social networks for pets. Well, your cat probably has no idea how many page views she's gotten this month, nor that she's been nudged by a poodle. But pet owners are lapping this stuff up like you wouldn't believe, and Ted gives us a glimpse into how bizarre it all gets...