Here are some of the interesting tidbits I came across today. Of particular interest are the Fedex Kinkos issue and Mark Russinovich's advice on LUA.
Apple Security Update 2006-001 - nearly two dozen reasons to update your OS X installations.
Fedex Kinkos Smart Card Authentication Bypass - seems as though Fedex Kinko's authentication system is weak due to its design.
SiteAdvisor - this is a nifty add-on for IE that helps identity potentially harmful Web sites
Russinovich on LUA -- Mark describes an easy way to run applications with reduced privileges.