No more PIE
For those who know, websites used to (and still do) track your movements/website visits/internet trends, by using cookies they'd leave on your computer's internet cache. You could delete these by going to your browser's internet options and clicking "delete cookies", and then setting your security settings a bit higher (to prevent future cookies).
But they've found another way to "get" you.
The newest method of tracking is called "PIE" (bastards are even using the name of a favorite food! ARRR!), which stands for "Persistent Identification Element." (click to read) This operates through Flash MX. In the link above, Macromedia has set up information on how to disable this.