There was a time when it felt like everyone was crazy about Groupon, which made a name for itself by selling deal-a-day discounts and vouchers on a variety of products and services. But as Groupon's vouchers became less popular, the site has redesigned itself as a new kind of Yellow Pages directory with a twist. Groupon lists business information just like the Yellow Pages, but as well as that it also offers its signature coupons and vouchers for each entry. In other words, consumers not only