As far as anyone at the government level seems to be concerned SA will "NOT" be reactivated now or ever.
As a matter of fact a statement as such has been posted here http://www.igeb.gov/sa.shtml"
Need to remember that while it was Clinton Admin that made SA removal official it was done because the military importance was no longer there. If as a terrorist you can get a nuclear or biological device within a couple hundred yards of your target then you don't need the little added accuracy of non-SA GPS any way. In fact during Desert Storm many of our forces carried civilian GPS units as they were accurate enough for their needs.