I'm looking for an application for Linux that will connect to an H.323 video conference and allow the user to send their desktop as a video stream, instead of using the image from a webcam. This is for giving presentations, when it is usually more useful to see the speaker's slides than their face.
All I have found so far is Ekiga, but as far as I can see it doesn't offer this facility. Something free would be nice of course, but paid-for software would also be of interest.
