My opinion is that you'll find representatives of all these groups in just about any kind of organization. Each group will require a different communication strategy if you're promoting the adoption of social media in the enterprise. Let me now if you have comments or suggestions about this diagram.
The Enthusiast
The Indifferent
The Skeptic
The Pragmatist
"What is it?"
"What's the ROI?"
"What's In It For Me?"
"I Want It Now!"