I am not sure if anyone has noticed this but it makes for a compelling reason to upgrade from Exchange (anything) to Exchange 2003. With all the new email born viri and spam this should help a bit. It even sounds like they are going to do like the Virus API and make a sort of SPAM API so third party software can tie right into the engine to make it super-fast.
I can’t wait to beta test this.
Oh, here is the link.