Just to try to illustrate what Second Life is like, a few examples of Videos.
A demo I did to show Virtual Worlds
This one I created as a back-up to a presentation I was asked to do, but I think it demonstrates many fun aspects of Virtual Worlds.
(The Objective was to show the educational potential).
A Visual Joke on Second Life.
I liked this, a wry joke at the expense of us "addicts". Clever.
Excellent Overview of Virtual Worlds
This one is very good, succinct insight to S.L.
A good overview of Second Life
Okay, not wild about the voice, but it is actually a very good overview.