I'm fascinated by the ad for Gavin Newsom's gubernatorial exploratory campaign that's been showing up on my Facebook page lately. The ad includes a photo of my friend Katie and says that Katie is a fan of Gavin Newsom. Her page confirms that she is a supporter of Gavin. So Katie is a fan of Gavin, and Katie and I are friends, and Gavin is advertising on Facebook, so I see Katie's photo in his ad. And Katie's photo appears above Gavin's in the ad.

Also interesting: when I visited Katie's page today the top ad was for the "Poizner for Governor 2010" exploratory committee. (Poizner is a Republican, Newsom is a Democrat.) Poizner's ad appeared above an ad for Newsom, even though Katie actually supports Newsom. So she's become an advertising vehicle for one of Newsom's potential opponents.