The dialogue takes place at noon Eastern time.
Those in attendance at the event in Durham, New Hampshire, will be able to ask questions in person, but online observers will be able to submit questions through the MySpaceIM instant-messaging client as well as through MTV.com and e-mail. Viewer reactions will be tracked by a Flektor widget--Flektor, as you may remember, was acquired by MySpace parent company Fox Interactive Media earlier this year.
The event will also be translated into Spanish in real time and moderated by MTV personalities Gideon Yago and SuChin Pak, WashingtonPost.com reporter Chris Cillizza, and pollsters John McLaughlin and Geoffrey Garin.
Future dialogues, which have yet to be announced, will individually involve Democrats Hillary Clinton, Barack Obama, Christopher Dodd and Bill Richardson; and Republicans Rudy Giuliani, Duncan Hunter, Ron Paul, Mitt Romney, John McCain and Sam Brownback.