I have looked at the service, and so far it seems amazing! I do however have a few questions (2 to be exact).
One, how server intensive is it really? Is it only server intensive when you are chatting, or just when its activated?
Second, how much bandwidth would this use. Lets say you have 500 users and 30 of them are actively using this each month. How much bandwidth could this use (with and without voice/video). I know this is a difficult questions, but just a general number would help (10gb,100gb,1tb)