A few years ago, I had the distinct pleasure of attending a pre-conference workshop led by David Warlick.  If you've ever attended a session led by Mr. Warlick, you'll know that he likes to run a "backchannel" for the audience to interact with each other.  From time to time, he will reference the backchannel discussion in the body of the session.  This was actually my first experience with backchannels, and, at first,  I thought it was a little odd, until the session really got going.  Then, the backchannel came alive with the audience responding to what Mr. Warlick …

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