The article, at least. MIT Sloan Management Review, with support from IBM, is making a set of ‘classic’ (thanks!) articles freely available to all comers. So the full text of my original SMR article "Enterprise 2.0: The Dawn of Emergent Collaboration" can be downloaded here.
I don’t know if this is a temporary or permanent arrangement, so I’d suggest acting quickly.
Update (9.20.07): I’ve just learned from SMR that the article will be freely available for approximately the next six weeks. Download now!