Adobe Connector was a choice of mine before. WebEX and WiziQ is a popular commercial remote web conference tool. DimDim had ruined the spirit of open source once before.
I used BigBlueButton for my class and it worked OK. 30 students managed to communicate. 4-5 had difficulties for their computer settings and traffic problem, but I wouldn’t say that was because of BBB’s incompleteness.
Here comes a review!