This article really sounds like a version of what Miicro Signet does in a different venue! A very interesting read and shows how IP can be spread throughout the web ! I am not saying that this is Micro Signet but it acts like it in a different way!
imo vic :)
ohttp://www.telegraph.co.uk/technology/internet-security/10982252/The-sneaky-new-technology-which-advertisers-use-to-track-your-every-movement-online-canvas-fingerprinting.html