SL is mentioned in the article about the value of online gaming below:
http://news.bbc.co.uk/1/hi/technology/4360654.stm
I'm also including the accompanying photogallery link: its a really interesting subject, I think.
Gamers Unmasked.
http://news.bbc.co.uk/1/shared/spl/hi/picture_gallery/05/technology_online_gamers_unmasked/html/1.stm