Lounge

I use bigbluebutton (BBB) it on my site to try and convince the administration to use Moodle; I have a hosted site apart from the institution I work at. They've been trying to make a decision about an LMS for some time... any how, things like BigBlueButton and Openmeeting are standard plugins with Moodle 2.1.2 (many more plugins std). The catch is, you must point to the server where BBB and/or OM are installed or located. Recap, plugins already installed to enable Moodle functionality-- vendor opensource software (both BBB and OM opensource) installed and pointed to (on plugin settings in Moodle).

I'm in Malaysia on +8 timezone but could arrange a demo; I believe you can go to bigbluebutton.org and see/use the demo from there.

BBB is awesome with it's presentation view, whiteboard, chat (all & private), video sharing and conference/listen (VOIP); the VOIP I believe is a Freeswitch technology and requires some thinking/server to dial in and have a ID, etc. There appears to be little "overhead"; I did a demo using a Celcom Broadband and the other guy Streamyx and it worked fine!

Openmeeting is BBB on steroids (16, 50, 150 people modes) for conferences, meetings and webinars...

Hope this helps?