Clay Shirky at Many-to-Many - Tags run amok!:

"Back In The Day, when I was trying to explain what I meant when I was talking about social software, but before Coates pulled my fat out of the fire by doing the work for me, I had all these wicked abstruse definitions that made everyone’s eyes glaze over.

The only definition I ever found that created the lighbulb moment I was feeling was “Social software is stuff that gets spammed.” Not a perfect definition, but servicable in its way."