Harold, as always, great post. I just wanted to mention about something about Social Capital. While the article that you linked to is great, realise that it's 10 years old and much research has been done since. I would recommend that you check out work done by John-Paul Hatala (I've actually worked briefly with him) either via his Website http://www.socialnetworkaudit.com/ or Ning Network http://flowork.ning.com/profile/JohnPaulHatala

Let me know what you think!