I just discovered that Sitemeter has been putting tracking cookies for realmedia.com on my visitors’ machines. There may be some others as well.
I went in, cleared cookies, refreshed Transterrestrial, and the Realmedia cookies showed up again. I’m going to quit using Sitemeter, but I need to do a little research and figure out what to switch to for stats checking. In the meantime, you might want to block cookies from realmedia.com (and the others mentioned in the link, such as specificclick.net) if you don’t want them selling your browsing habits without your permission.