Enterprise Social Networks and beyond

This is a good post on the constellation of tools that can be used for communication and collaboration. My recent experience is that Windows Sharepoint Services provides a superb platform for interaction and problem solving. The site can be open or closed to just a few users and employs web parts to extend the functionality of the platform. I agree with this writer that Sharepoint needs to be extended with tools like Trackback, aggregators like NewsGator, which I use, and wiki style page creation, and blogrolls. For an enterprise, the robust functionality of Sharepoint Services make it a good choice as a collaboration platform.