Everything old is new again...

In response to my Tweet

Joel Demay pointed out to me that Facebook's Graph Search helps you search for people, places and things...

Image:People, Places and Things

Which was the main focus of Lotus's ~1999-2002 Knowledge Management efforts. "People, Places & Things as the three essential ingredients of an effective Knowledge Management infrastructure"
I especially like how together they support relationships and community, all within the context of what you're working on.

Sound familiar?

Image:People, Places and Things