In the middle of a cold, gray Chicago winter, nothing looks more attractive than a white sand beach and temperatures in the high 70s. That’s why we posted real-time, real-temperature billboards in front of Chicago’s affluent commuters and shoppers during the months of November through March. Prominent URLs allowed the winter-weary Midwesterners to book their warm-weather escape right from their mobile phones – important when you’re waiting for a train in the middle of a snowstorm.