In addition to the big security summits, we also have some half day MSDN security briefings coming up. These aren't part of the standard MSDN seminars that I deliver, but are focused purely on security and are delivered by specialist presenters.
In my area, the four briefings announced so far are:
Scranton, PA, Wednesday, March 3rd
Roanoke, VA, Tuesday, March 16th
Charlottesville, VA, Thursday, March 18th
Butler, PA, Thursday, March 25th