Whispering in the back of the room

Techie types have taken to messaging and blogging during presentations. Some presenters object to the practice, others support it.

I don’t see how anyone can block conference and meeting attendees from using messaging, and I don’t see many good reasons to try. But I do like the idea of a presenter offering a channel for discussion during his presentation: What a great advantage it would be to later review what people were whispering about.