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Location: Palo Alto, Calif.
Industry: Information Technology
2007 Sales: $150 million
It's helped elect a president, changed the way people communicate, and is altering the world of online advertising yet again. The popular social network, which now has more than 160 million members, could even end up more influential than Google (GOOG), says Pop!Tech and Z + Partners founder Andrew Zolli, one of our advisory board members: "Advertising, media, and consumer product development are all going to be influenced by social networking, and more particularly, by the ability to extract from social networks relationships which are indicative of buying and selling patterns, or consumer influence patterns." As it seeks to expand even deeper into international markets—the site doesn't yet have a strong presence in Brazil, Germany, India, or Japan—Facebook's influence will only continue to soar.