Vampire Weekend has been saddled with the "blog buzz band" tag since day one, but breaking down the data behind those posts reveals more than idle chatter. Who knew that an obscure Wisconsin-based blog drove early interest, or that David Byrne and Animal Collective were the two acts most frequently included in posts about the preppy Columbia grads? On the chart at left, Billboard runs the numbers behind the hype by looking at blog posting volume plotted against real world events and sales data.