JanRain has developed a single sign-on service for multiple passwords that lets people hop freely from site to site. Business demand for JanRain's services is expected to grow as Web 2.0 entertainment and social-networking sites proliferate.
Funding: $1 million (founders)
Cofounder & CEO: Scott Kveton (shown right)
Headquarters: Portland, Ore.
Employees: 11
Founded: 2006
Business model: Advertising, subscriptions
Bragging rights: 50,000 users (nearly double the number in December)
Next up: Partnerships with bigger websites; new product rollout by summer
Contact: Scott Kveton,
Kveton@janrain.comTell us what you think about our 25 startups to watch: Are any of them the next YouTube or MySpace?
Why does Business 2.0 name Revision3 a startup to watch? Its popular online show, 'Diggnation,' says it all. (more) 
Tech startups are finally returning to Wall Street - and here are six that are likely to cash in. (more) 
These futuristic projects promise to make the world greener, while making entrepreneurs some green. (more) 
