Vin sent me a link to this article by Phil about Enterprise 3.0 at DrKW and their 4 pillars of Enterprise 3.0 which, as he pointed out, are very similar to the 4 pillars of Edge:

Publishing = Rich Content

Discovery = Discovery

Fulfilment = Relationship Management

Conversation = Collaboration

Of course they  are also referred to by Andrew P. McAfee  in his article "Enterprise 2.0: The Dawn of Emergent Collaboration" which I talked about in my last blog.