Background for those unfamiliar: In October 2003, Microsoft announced that they needed to organize their security patch release process, and therefore would release patches on the second Tuesday of every month. They somewhat recently added a little advance warning where they would announce what products would be being patched the prior week.
Microsoft just announced:
On March 8th, 2005 the Microsoft Security Response Center is planning to release no new security bulletins.
This is just completely unheard of.