Michael Howard (author of "Writing Secure Code") has released an article on MSDN Magazine titled:
"Attack Surface – Mitigate Security Risks by Minimizing the Code You Expose to Untrusted Users".
It is definitely a good read, stressing developers to adopt a coding strategy that minimizes the risks.
You can find his announcement of the article on his BLOG http://blogs.msdn.com/michael_howard/archive/2004/10/19/244642.aspx
with link to the article itself.