Botnet Found

Our Security Technician found yesterday a 200 user botnet on a hidden IRC server and was able to quickly email the compromised systems information (just hostname) to our abuse email. So today i spent the last 2 hours sending emails off to web hosting companies, educational institutions and corporate companies telling them that their systems have been compromised, we regulary email out systems we have found compromised. The thing that stuns me is that most of the systems we found compromised on IRC are dedicated lines between 10MBPS to 1GBPS... I found a few hosting companies and will list them so they can be found by them:

lvps212-241-192-85.vps.webfusion.co.uk
wp056.webpack.hosteurope.de
wp097.webpack.hosteurope.de
wp049.webpack.hosteurope.de
wp055.webpack.hosteurope.de
m2.wrango.com - Dedicated Server with NetworkSolutions
server1.hostfree.com.br