There is a new release of the Project Openmeetings now in Version RC3 (Beta3). It now comes with a ScreenViewer! So you are able to share your desktop with any participant of the meeting. See ScreenViewer for more info.
Screen of the ScreenViewer Modus:

Installation instructions:
http://code.google.com/p/openmeetings/wiki/InstallationOf05RC3Beta3
Changes from Beta2 to Beta3:
http://code.google.com/p/openmeetings/wiki/05Beta3Changes
Main improvements are that the ScreenViewer (see
http://code.google.com/p/openmeetings/wiki/ScreenViewer) is […]