“…A shadowy group is using some severe tactics to rid the computer world of Spam — and with some effectiveness. NPR’s Dan Charles reports.” NPR Morning Edition [with link to Real Audio]

Here’s the SPEWS site.

“SPEWS is a list of areas on the Internet which several system administrators, ISP postmasters, and other service providers have assembled and use to deny email and in some cases, all network traffic from.

This private list is now available for the general public to read and/or use for email filtering.”