I recently posted an announcement (lost in the long weekend) to the MSDN forums in an attempt to highlight and thank some of the best contributors. 

http://forums.microsoft.com/msdn/ShowPost.aspx?PostID=13946

Who's posted the most replies marked as answers? Who has been rated as the most helpful poster?  I've wanted to know for a while.  This week I got my very own read only drop of the forum database so I could run all sorts of fun queries...

I also know that to date you have a 70% chance of getting your question answered (actually having a reply marked as an answer) here so far, there have been 2911 unique people who have actually posted, and it's very likely that you received an answer in roughly 2.5 days after you posted your question.

Click the link above to see the top answerers and most helpful rated users.