From Eric Byres:
Just a heads up that we are posting a new version of our Stuxnet White Paper in the next hour.
Basically we massively updated the original paper we publish at the start of the Stuxnet event back in July) to focus on specific mitigations that are recommended for all control systems, regardless of whether Siemens product is used or not. The link for the public downloads will be at http://www.tofinosecurity.com/professional/siemens-pcs7-wincc-malware
I have attached a Word Version for your convenience. You can download the PDF version form the website or just ask.
Eric Byres P.Eng
Chief Technology Officer
Byres Security Inc.