ooVoo has just released a new Facebook app allowing any user to videoconference at zero cost with up to 12 people. No registration or download is required.
ooVoo is a downloadable software available for Mac/PC/Android/iOS.
Business Insider article: http://www.businessinsider.com/the-next-billion-dollar-business-oovoo-branches-out-to-attract-new-users-2012-5 ;
More info about ooVoo: http://www.oovoo.com
Try it: https://apps.facebook.com/ooVoovideochat/ ;
(Thanks to Jaana Nyström for discovering this one)
Via Robin Good