From last week via @Sathya:

http://superuser.com/questions/470348/how-much-information-can-websites-get-about-your-browser-pc

> Does anyone know of any other sites that will be able to get more information from the user passively like this? I'm not talking about port-sniffing or any kind of interaction from the user, just the info that a server can get from a 'dumb' visit.