This guy has spent an insane amount of time collecting and organizing useful security links . . . but he doesn't just throw them in a blog in random order - he's got a graphical legend and mad organizational skillz. 

Although I must question some of his so called 'security expert blogs' . .  anyhoo here's the href: http://blogs.technet.com/feliciano_intini/pages/microsoft-blogs-and-web-resources-about-security.aspx