If you are surfing the web have you ever noticed that sometimes the
pop up ads at different web sites all start to look the same? I did.
So I began to write down what ads i was seeing at different sites and
determined that no., I wasn’t going crazy. I was seeing the same ads
time after time. Trying to figure out why I learned about flash
(from MacHacks.tv) Good reporting from Wired’s Epicenter clog:
Flash Player Help
Well written article specifically about the use of flash cookies for tracking web users by Dan Tynan for IT World.