I have seen several threads and blogs about the impact of social networks on business processes. The concept is interesting and should be taken seriously by large organizations. Why? By focusing efforts on developing and maintaining a rich and optimized information environment for their knowledge workers, organizations will get better overall results than by focusing on "business process re-engineering" (BPR).
BPR, when knowledge workers are concerned, does not work very well. Different people work different ways - after all, being a knowledge worker is very different than working on an automobile assembly line. Irving wrote a more detailed piece on this theme.