Bebo has built a social network, more than 30 million members strong, that keeps users' pages private but still allows them to share things like video and drawings made on an online whiteboard.
Founders: Michael Birch (also CEO), Xochi Birch (shown right)
Headquarters: San Francisco
Business model: Advertising
Bragging rights: Profitable; advertisers include Disney, Alltel, Dawn and AOL)
Next up: Promoting new Bebo Authors channel (launched Feb. 22); hiring in-house sales team
Tell us what you think about our 25 startups to watch: Are any of them the next YouTube or MySpace?