My church recently added a service where they encourage the congregants to tweet during the proceedings -- how's the music moving you, what questions do you have or ideas you want to add to the preaching, are you bored with the prayer and think they should move on already -- that sort of thing.
To tweet or not to twitter is the big question that has hit churches. The arguments for tend to be about twitter being a form of sharing (and sharing can never be a bad thing) and besides, this is a way to get the whippersnappers interested.
Most of my thoughts on the topic are summed up pretty well by Josh Harris (although I would quibble with his point #4).
My personal summary deals with biology: the human brain can not focus on two things at the same time, even if the said human is young and fashionable. ( I know this from Brain Rules!)
Which is why we now ban talking on the cell phone while driving - no matter what age the driver happens to be.
So the guy twittering during a lecture can not be giving full attention to both things.
Thus my opinion: if you believe that what your pastor and worship leaders are doing up front is rather shallow and not really worthy of attention, please by all means, encourage twittering during the service. It might help.
If you are striving to make what is going on up front something with depth, something profound and maybe even personal, encouraging distraction is, perhaps, not the best choice.
Just my thoughts,