Yeah, there are a few of these, Second Life has really taken off big time!
Second Life is similar to your internet chat room, only in a 3 dimensional graphical virtual world!
Where you first create your man/woman avator (character), and can then walk around in this massive virtual environment, and chat to other people also walking around in there.
You can even build your own landscape/property/buildings, and people in the environment can then walk around and in the buildings you built.
So it's like having another lifestyle (a "second life"), where you spend time in this virtual world with your character, and socialise and wander and explore, and make new friends etc.
It's turned into an epic size, with 1000's and 1000's of members that 'inhabit' the virtual world, suppose the same way the internet started off as a small network between a couple of Universities, and now into THIS!
Not actually registered on 2nd Life, but might give it a try at some point
