Linkosophy explores the evolution of information architecture, emphasizing the importance of conversation, community of practice, space, structure, and identity in shaping user experience on the web.
But very few interfaces do a brilliant job of the third need: showing me where I've been and how I got here. We can do it at small scales. Patterns like breadcrumbs help us navigate through website or wiki with lots of subpages, but those don't scale well beyond ~7 steps.