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We called it: Facebook is launching an ad network that will reach far beyond its website, much like Google's AdSense. Now others are confirming it. A source told AllFacebook the SocialAds ad network Facebook will announce in New York on November 6 will work by installing cookies on members' browsers. Then, when these members visit publishers in the SocialAds network, Facebook will serve ads, targeted by the personal information it has on those users. The skeptics' take? Some in tech aren't convinced the information a Facebook user puts in the profile indicates any useful information, such as an intent to buy. But then again, the advertising industry plans to fund Sex and the City reruns for the next 40 years with tampon commercials. Just getting basic demographics right will count for a lot.