After typing "meow" and hitting enter. The copy paster url had this to say about me "It seems you didn't save the word. Go to lab.cubiq.org/underpants first."
The unique fingerprint is also different. "93615388f7f54cd79d2f806ac3795c182217aa9b" somehow became "f37ec3fdd05c27c13cbb7fcdef95cc004297f62d" after copy-pasting.
Other than that technical glitch for me (Linux, Chrome latest unstable version), I still think this is actually a pretty good idea. But will websites use it now that the ones we actually want to worry about are injected into every website via Tweet and Like and + and whatever buttons.
Google in particular is everywhere with their gAnalytics tracking code.
edit: now that I think about it, I may have misunderstood the point. Was it a proof of concept of providing cross-site tracking without tying to a personal identity?
If not, insecurities in cross-site whatever hardly matter when I am logged into every little tidbit that is loaded via iframe and appears on almost every website. Even porn sites have like buttons these days.