Months after rumors of its interest first surfaced, Comcast has officially bought Plaxo. Terms weren't disclosed, but we last heard that the price was rumored to be around $175 million. For now, Comcast is keeping Plaxo and its engineering team in place in Mountain View, giving the cable company a toehold in Silicon Valley. I briefly spoke to Plaxo marketing dude John McCrea, who outlined some possibilities for how Plaxo could apply social networking to Comcast's Web properties. John, sounds great, but I'd be happy if your engineers could just figure out how to connect my Comcast.net Internet ID with my Comcast.com billing account.

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