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Anand Rajaraman & Venky Harinarayan

"A lot of companies take existing e-commerce sites and try to replicate that experience within Facebook; that doesn't make much sense, because there's nothing new there," says Anand Rajaraman, one half of an Indian duo building social- and mobile-powered commerce products for Walmart (the division prefers the Twitter-style moniker @WalmartLabs). Their Shopycat app looks at Facebook as a huge stream of data to predict what gifts your friends will like. It works (very roughly) like this:

Click here to read tips on how to work as a pair from Rajaraman & Harinarayan and Flavio Pripas & Renato Steinberg, No. 54 on our Most Creative People list.