Never heard of it, but judging from what I read that that link I think I would find it very annoying.

From what I understand you create an avatar there. Then when you go to various websites, if others have created an avatar as well and are also at a website you are visiting, you see each others' avatars on your screen and can interact with them, just like you do when you see people in person.

http://www.weblin.com/index.php?cmd=B4DA282A01&room=de1

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi