takes on the topic of How to Measure Social Media ROI for Business on Mashable today, and I welcome his perspective. I also very much appreciate his referral back to this blog to keep the conversation going. That's exactly what it's for.
-- there are lots of accepted metrics - -share of conversation, share of engagement, the conversation index -- the problem is that there isn't ONE acceptable metric because there isn't one universally accepted goal. There are, however, a number of good metrics that clients are accepting such as the Optimal Content Score and correlations to web analytic data like repeat visits, purchases, and downloads. I'd suggest trying them out and seeing what works for your particular situation.