On the Wikipedia, there is an article on the Residents of Second Life. Within this article is a section designed to be a list of Residents who have "achieved fame or notoriety through Second Life".
The list however, is poorly maintained and abused by Residents trying to make themselves look more important than they are (in the grand scope of things at least).
If you do not have an account on the Wikipedia, please use the talk page to discuss changes to the Wikipedia article. If you do have an account, please peruse the Wikipedia article and see if your knowledge of Second Life can improve the article.