Comcast blocks some Internet traffic - Online World - MSNBC.com
"Comcast's technology kicks in, though not consistently, when one BitTorrent user attempts to share a complete file with another user.
Each PC gets a message invisible to the user that looks like it comes from the other computer, telling it to stop communicating. But neither message originated from the other computer — it comes from Comcast. If it were a telephone conversation, it would be like the operator breaking into the conversation, telling each talker in the voice of the other: 'Sorry, I have to hang up. Good bye.'"
Hmm, Net Neutrality opponents? Still think we can trust ISP's to regulate themselves?
Comcast apparently doesn't like users of Lotus Domino, either. So, now it's personal.