Just out of curiousity, I thought I would try the PeerGuardian program and enable the HTTP blocker to see what showed up in the logs.

I did this while opening my Firefox Browser, and I have three sites bookmarked to open right away, and while this was going on I had disabled the HTTP feature in the PeerGuardian program, well was I surprised, out of the 3 forums I have bookmarked only one opened the other two, (one is AO) would not open, so I looked in the logs and noticed these:

Media Sentry Inc
Safenet
Jupitermediacorp

These were being blocked by the program, now I started to readup on MediaSentry and it turns out they are being aquired by Safenet http://www2.safenet-inc.com/new_site...ory.asp?ID=388
This is what I found for MediaSentry Inc....

MediaSentry, based in Morristown, New Jersey, is a global provider of anti-piracy and business management services for the recording and motion picture industries. The company’s anti-piracy solutions help clients detect and deter unauthorized distribution of copyrighted content and prosecute those who engage in piracy.
Sounds like that 3rd party stuff Soda_Popinsky is talking about.

Some of the IP's logged 206.169.164.228 Time Warner
63.146.109.212 Qwest Communications (jupitermedia corp)
63.236.73.76 Qwest Communciactions (jupitermedia corp)
192.43.161.100 Safenet