William F. Garrity

At the site Speaking about Presenting there is a pratically use article on how to make twittering an important part of your next presentation. 

The two best alternatives to Twitter as a presentation backchannel

October 28, 2009 by Olivia Mitchell

The advent of the backchannel is a tremendous opportunity for presenters. The backchannel is an online conversation that takes place at the same time as people are talking live. Audience participation didn’t use to scale easily beyond a small group. Now, the backchannel allows every audience member, whatever the size of the group, to be an active participant. However, if you plan to use a backchannel proactively in your presentation, it may be better to use a backchannel tool other than Twitter.

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