When talking about the new Web 2.0 tools in an enterprise setting, I often refer to the new generation of employees. They will be used of having social networking, blogging and publishing tools available. They will not accept an IT department banning these from the workfloor.
Just look at the number of school and university groups in Facebook and the like. All of these will (very) soon evolve into professional work related groups, following the live path of the group members.
And today, I came across of this gem :
And this one, on how blogging and reading blogs spreads passion :