Introducing Collusion: Discover who’s tracking you online
All of these services / plugins / demos are incomplete without analyzing Flash cookies. I worry the result is people thinking they're more anonymous than they really are.  (You can view your Flash cookies here: http://www.macromedia.com/support/documentation/en/flashplay...)I'd really like to see the browsers take on this practice. Safari, for example disables 3rd party cookies by default, but leaves open this huge hole via Flash.