eduFire is a recent client of mine and I was involved in building a small flash app for testing audio and video settings through the Flash Player and alongside Stefan helped with the text and video chat application itself. Looking now at how this company has grown is astounding, they have more than 500 tutors who have trained students in more than 900 hours of one-to-one tutoring sessions (article). This is a brilliant way to learn and totally utilises the capabilities of Flash and Flash Media Server. Well worth checking out. In the mean time if your interested in video integration and real time collaboration be sure to visit muchosmedia.