Good Read for Web Server Admins
I found this pdf written by a team at google. It's about malware
distribution and how anyone can be part of the problem. A good read in
my opinion. They don't have to compromise your web server for you to be
part of the problem. Just google search: All Your iFrames Point to Us
http://www.google.com/search?hl=en&q=All+your+Iframes+point+to+us&...