I have recently participated in a survey on how expertise is leveraged and managed in organisations. This is part of an open research project where the results of the research are made available to the KM community as they are finalised. The project blog is at http://usingexpertise.blogspot.com, and there is also a wiki showing the outcomes of project workshops at http://usingexpertise.wikispaces.com
If you have time to complete the survey as well, please do add your perspective. The survey is at http://tinyurl.com/expertisesurvey, and when you have completed it, you will see the results of the survey collected so far.