Startups to watch

It's getting crowded on the Web 2.0 frontier, but there are still some startups that truly stand out. Business 2.0 Magazine identifies the ones most likely to strike gold in 2007.

Loopt offers around-the-clock friend tracking. Cell-phone customers are using Loopt to let their buddies see their locations. It's already a hit with some 100,000 Boost Mobile subscribers who want to know not just what their posse is up to but where it's at.

Funding: $5 million (New Enterprise Associates, Sequoia Capital)

Founder & CEO: Sam Altman (shown right)

Headquarters: Palo Alto, Calif.

Employees: 18

Founded: 2005

Business model: Advertising, subscription

Bragging rights: Partnership with Sprint

Next up: Signing up sponsors; in talks with second U.S. carrier

Contact: Bizdev@loopt.com

Tell us what you think about our 25 startups to watch: Are any of them the next YouTube or MySpace?

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Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer Morningstar: © 2014 Morningstar, Inc. All Rights Reserved. Disclaimer The Dow Jones IndexesSM are proprietary to and distributed by Dow Jones & Company, Inc. and have been licensed for use. All content of the Dow Jones IndexesSM © 2014 is proprietary to Dow Jones & Company, Inc. Chicago Mercantile Association. The market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. FactSet Research Systems Inc. 2014. All rights reserved. Most stock quote data provided by BATS.