Don’t know because I haven’t tried it yet…but it sure sounds cool.
Yugma SE is a plug-in for Windows- or Mac-based Skype users, and is available for free here. Like the standard Yugma application, it allows Skype users to share their desktops with each other during Skype sessions. Users can sign into the plug-in with their Skype names, and up to 20 participants can collaborate at one time for free. (Yugma itself went from a maximum of 10 to 20 participants recently.)
(via web worker daily)