The design of social media tools and services is a bit of an art, and a tricky one at that. Where design methodologies exist, they compete with business requirements and a rapidly changing landscape. Where business goals exist, they, too, must adapt to a marketplace rife with competition. Where best practices exist, use of them in new contexts and tools relies as much on trial and error as it does a well-conceived social design plan. And where engineering solutions exist, they t...