Hi Mark, thanks for that. I've had the tab open to respond to that for almost 2 days now and haven't got round to doing anything yet! Looks very interesting indeed and akin to the "Conversationalist" category that Forrester have added to their Technographics ladder. Hope all is well with you and the family. So very happy things are going so well for MS too!
Thought this might be of interest... http://www.marketsentinel.com/blog/2010/09/sociability-a-new-social-media-metric/