Mainstream Social Network Analysis
There are a few indications that SNA is being made more accessible to the business world. e.g.
Entopia -- Social Network Analysis is a plug-in for their Quantum Suite. I saw Quantum last year and it takes an individual-up approach to KM (think Personal Knowledge Management that tries to scale). The problem with this approach is that it can lead to lots of duplication and fragmentation as everyone keeps 'their' version of a file (think of how people handle e-mails with attachments).
The great thing about this new module is that it maps networks automatically based on real, rather than reported interests. Downside is that mapping your interests and contacts can trigger 'spyware' reactions in staff. Entopia has some privacy controls, but this is a very delicate area, and I think makes management very wary.