Social Software = Stuff That Gets You Laid.

From Clay Shirky

If you want to do something that’s going to change the world, build software that people want to use instead of software that managers want to buy (...) “Social software” is about making it easy for people to do other things that make them happy: meeting, communicating, and hooking up.

Partly true. Social Software is both stuff that can get you laid, and stuff that can let you laid off, because managers will always pay, and pay dearly, to remain in control of information flows. But maybe Clay would argue that this is not about changing the world but maintaining the status quo.