Clinton - 11:18 pm on Mar 14, 2013 (gmt 0)
Thanks for your insight.
1. Contacting the 'abuse' address for the ISP is one route to take (may or may not get a response). May result in a few hosts getting fixed.
1000 uniques over the past day. This won't scale!
There may be some interest by Interpol or a military/intelligence anti-cyberterrorism organization (or they might be causing it). I would cantact an organization like this... I remember some big botnet just got shut down in the past couple months, you could try whoever was involved with that.
I've contacted https://www.team-cymru.org/ about this, they may be able to assit.