Second Life isn’t a website
I hate when someone calls Second Life a website. It is not a website. A website is composed of html code, (or php or similar code), images and maybe flash. There is usually no interactivity and definately no interacting with other users visually. Second Life is a web based game similar to other computer games but with real time communication and interaction and the ability to build and retain rights to what you create in order to make money.