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Instant gratification is the way of the Web.
Sure, you can dump items willy-nilly into a virtual shopping cart and pay for them in a flash. And even grocery sites such as Peapod usually require overnight notice to make a delivery. A scant 40 minutes later, a Lycra-clad Kozmo courier arrived with the goods. Subsequent orders have arrived just as rapidly, including one I placed during an industrial-strength New England snowstorm. Kozmo's cool, no doubt.