I'm not sure if many people know about this site, but usually when I'm bored I read a bit of it. It's an MMORPG research done over some years and I found it really interesting as it talks about many aspects of MMORPGs.
Site of the Daedalus project.
Daedalus Project
http://www.nickyee.com/daedalus/
Daedalus Gateway, it's like a portion of site.
Daedalus Gateway
http://www.nickyee.com/daedalus/gateway_intro.html
Enjoy