Realtime feedback

I came across this article earlier today, wow, what a concept. I'm really curious as to how it actually worked. Was the speaker reading his text msgs throughout his talk? Did he respond to any of the msgs while he was talking? Very interesting though, I give him credit for taking the risk.

Thus far, we've only used text msgs at Grace to communicate about service information between the people on the stage and the techs supporting them on the Mezzanine. Oh, and last week I used one to pull someone out of a meeting.