+1 for hubs, I only found it recently and was positively surprised when trying it out the first time. It is missing the webcam-video-on-avatar function though, or it is well hidden?!
Check mibo, getmibo.com for the webcam on avatar. Desktop chrome only.
nope, never implemented it. you can share your camera but they are not avatar-attached. the theory being that we didn't want to implement that unless absolutely necessary, since it has a lot of tradeoffs.