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I remain utterly obsessed with ubiquinnoying Pownce cofounder Leah Culver and heterofabulous Flickr engineer Cal Henderson, not least because he tweaked my nipples the last time I saw the pair in Austin. A tipster reports spotting the besotted twosome at the Westfield mall in downtown San Francisco, going into a screening of 21, a tale of geeks who used higher math to take the house in Vegas. Could a desert debauch be in their future? (Photo by magerleagues)