Rotisserie

http://h2oproject.law.harvard.edu/rotisserie

"The Rotisserie is a structured online discussion system that provides
an alternative to the traditional threaded-messaging model of most
online discussions. It breaks discussions into synchronous rounds,
slowing down the pace of the discussions, and controls who responds to
whom, democratizing the discussions and making it very likely that
someone will respond to every participant." Tourists may find the
interface confusing to browse, but here is a simple example 
that had 6 participants and 2 rounds:
<http://h2o.law.harvard.edu/viewRotisserie.do?rotisserieId=138&expand=all>
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