Scott Moore reminded me of a series of posts that started one year ago tomorrow right here at Common Craft. These posts, though a bit sprawling, mean more to me and what I do than perhaps any other.
Why? Because it's a framework that can be used to describe social tools. Either they flow (timely and engaging) or they are stock (archived, organized reference). I'm resurrecting them because the framework will be a big part of Social Design for the Web.
This graphic makes the distinction.