Ben Fathi, the Corporate VP of the Security Technology Unit has kicked off a new blog focused on Windows Vista Security.  I've added a link on the side and you can read it here:

Also, while I'm on the topic of Ben, let me remind you that he also hosts a Technet Chat that allows you to connect and ask him and his extended team any question you want each month directly.  You can add the next one (August 10th) to your calendar, or pick from the list of Upcoming Technet Chats.