There has recently been a lot of talk about Second Life. It is a huge simulator, with a grid of computing muscle in it. It simulates 3D life, and it has a decent business model too..
From whatever I have read in Wikipedia and several blogs, it goes like this:
They have created a virtual world, which you can enter by launching their client (after installing it in your system). They stream the 3d Content to your client, which renders them on your screen. Each user might be playing around in some part of the Second Life.. It seems to be a good engineering marvel, as they will have to simulate the 3D environment in their Grid, render them and then stream them to the client. The client has to reconstruct them and show it..
It seems that of recent it has been receiving massive attention across the globe and access to the second life is getting difficult. I instlaled the latest binary from their site and launched only to see that SecondLife.exe was running 100% all the time.. On my desktop it wouldnt budge to connect (it loads the first screen where you enter First Name, Last Name and password) and says Unable to connect due to protocol (some thing)... and possible reason attributed for that is Internet connection does not exist. I m sure I m connected to the internet in my desktop.. Second life denied!! :(