Terry Zink has a more detailed post on some of the spammer arrests and takedowns that have happened recently.
In addition to the events I mentioned yesterday, authorities arrested an Armenian man suspected of running the Bredolab botnet. Unfortunately, the arrest has not stopped the spam with the malware payload.
These are issues that many ISP abuse and postmaster desks deal with on a daily basis. Their filtering schemes and policies are in place to protect customers from the mob, and criminals. I don’t think enough marketers and senders understand exactly how much the ISPs are dealing with and why many ISPs don’t really care that “mail is taking 12 hours to get to the inbox.” They are dealing with much more important things.