AdMob offers a place to buy ads for delivery to cell phones. That market is set to explode, and AdMob - which says it has sent out nearly a billion ads in less than a year - is poised to become its middleman of choice.
Funding: $4 million (Sequoia Capital)
Founder & CEO: Omar Hamoui (shown right)
Headquarters: San Mateo, Calif.
Business model: Advertising
Bragging rights: 800 publishers, 250 advertisers
Next up: Technology to deliver interactive ads to mobile phones
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