SDL alumnus James Whittaker has a blog. I meant to write a note on this weeks ago, but I kinda got busy! Anyway, if you're a tester, or have a passing interest in test, James is one of the best and you should learn from him. He's the author or coauthor of How to Break Software, How to Break Software Security and How to Break Web Software.

http://blogs.msdn.com/james_whittaker/default.aspx