First, we would have to make sure that the technology was set up to synch the convos in order so that people could actually follow them as a conversation. Second, I would break the students into smaller groups so that they could actually have a conversation that would move forward. The idea is for the students to learn things by researching and taking on and listening to various positions in an argument, but I felt like last week's debate was a bit hard to follow, let alone to analyze and respond to. Part of my confusion could be due to the fact that I missed the first class on this topic, but I think these things just seemed built into the activity (as this is the second time I have learned about this; I saw Rick's presentation at the MCTE spring convention last year).
Anyhow, I would try this in my classroom with the various adjustments I have mentioned.