Some know I am a big fan of
Meebo, as it allows all kinds of instant messengers without installing any software (it's using the browser).
They released a new feature called meebo rooms a couple of days ago, these are kinda like small chatrooms (no need to register to use them) and also allow people to paste links for videos and everyone can watch them!
I created a Legion one, so if anyone is bored at work:
http://www.meebo.com/room/legion/
It would also be possible to add it to the website :)
(e.g. I am using one for my Eve CCG project atm:
http://eve.starside.de/chat/)
cu starside
Ice