With Dimdim I have not been able to get the audio to work correctly although i like the layout of the platform and the features within "the class"
FM seems interesting as it is open source, although the fact that only one person can speak at a time is a serious problem
Yugma- I really like Yugma so far with the skype integration although with skype only allowing four participants it seriously limits the possible size of the classroom...
What i really would like is a classroom with audio and video conferencing capabilities like what i get from the skype/yugma combination but with one program...any thoughts
I'm not sure about the WebEx integration based on which APIs etc. Moodle would need hooks into. However, I have seen and used WizIQ which may end up being an option for you.
Hope this helps and happy Moodling.
Killeen ISD, Killeen, TX
I was researching this exact topic earlier today. I don't know if this still is important to you, but I figured I'd post what I found so others don't need to go through the same work.
In terms of web conferencing quality, I've used a couple, from Adobe, Microsoft, and others. The best I've found was WebEx, and wanted it integrated with Moodle. It seems Groopex Integrated Conferencing integrates WebEx with Moodle, as well as other conferencing providers (although who would want the other ones is beyond me, as WebEx is so much better than the competition). They have some YouTube videos to see what it looks like.
Not sure if I'm going with them yet, but it looks like a viable option.