If you are interested in exploring Second Life, you might want to read the blog InfoIsland.org, otherwise known as Second Life Library 2.0. This is the new home for the Second Life library enthusiasts. I profess to having tried Second Life, but found it difficult and time-consuming to get started. I am sure once you know what you are doing and have established an identity/character/home it would be much easier. Learning how to do the animation was a pretty steep learning curve for me.
That being said, this blog is interesting. Perhaps I will be inspired to go back at some point. I never did make it over to the mythical library island while I was there.