The discussion by Alan is quite technical but I know some of you are up for that. Check it out at 3 graphics + 1 XML edit: Skin your twittercamp. I wonder whether you would n
I could see this working well for a PD including teachers who would love to interact with the speaker, to ask questions and make comments. In a similar way to our Eluminate session last night with Mack Male, questions could be asked and answered very quickly.
If this were to be used in a PD session, I think the speaker would need to have a clear agenda. Otherwise the presentation could veer off into answering the participants' questions rather than giving the talk with new information. For the presenter, there would be a fine line between interacting with the audience and presenting the information which is the reason why you were invited to speak in the first place.
References:
Levine, A. (15 July 2007). 3 graphics + 1 XML edit: Skin your twittercamp. In CogDogBlog. Online at http://cogdogblog.com/2007/07/15/3-graphics-1-xml-edit-skin-your-twittercamp/