[longb4]

The EFF has a service called Panopticlick[1] that gives you a sense of how unique your browser looks to the sites you visit. My result: "Within our dataset of several million visitors, only one in 886,262 browsers have the same fingerprint as yours."

[1] https://panopticlick.eff.org

[icebraining]

Well, if the rate holds for Google, it means there's 1320 users that look just like you.

[ggreer]

While it can be an issue, browser fingerprinting isn't as powerful as the EFF claims. Any change to your user agent (browser updates), plugin list, time zone, or screen size makes Panopticlick think you are a different user.

[willvarfar]

Correlated with a second or third tracking method such as cookies sent to analytics, ad and fb sites, would it be super sticky?