A tweet from Matt Lingard informed me that he was intending to revisit Yammer. I resp0nded and suggested he takes a look at  Martin Hawksey observed the discussion and mentioned

We should possibly look at (clever name) for our amplified events workshop session at the JISC conference.  In addition this illustrates the value of open discussion on Twitter – without Matt saying what he was planning to do and me responding with a suggestion I would not have been aware of the new service.