Microsoft gets serious about security - Nov. 18, 2003:

"Chairman Bill Gates unveiled new anti-spam software technology called SmartScreen during his keynote address at the annual Comdex tech trade show in Las Vegas on Sunday night. Add-ons to several existing Microsoft e-mail products with SmartScreen built in will be available early next year. "

I'm curious how this will bode for existing SPAM prevention companies out there since msft can leverage its exchange server (whereas others cannot).