I have been using Sitemeter for years to provide a simple visit counter and reports for some of my web sites. Recently, I noticed that sometimes my Ithicos site was loading slowly sometimes and the browser was going to a lot of sites that I *know* I don't have links to.
Apparently, Sitemeter has been bought by the same ad-ware intensive company that bought MySpace. And, now the script that you embed on your web site for the Sitemeter is also going out and establishing connections and setting cookies for all of these other sites.
I not only found it is setting this cookies and establishing these connections, but it is also REDIRECTING my site to an "ad" page and my site visitor has to click "Return to Original Site" link.