Clicked on your link. Ironic to see the B-52 (as mothership to the Pegasus) and its possible successor, the X-43A, on the same NASA page.
Can't help but wonder about weapon targeting and dynamics (release and flight control) at Mach 7. Rear ejection a la A-5 Vigilante/reentry heat shielding/offboard terminal guidance? Hmmm...
maybe they would slow down for the bombing run... not sure.. the scramjet technology isnt even fully tested all the way yet so.. not really sure, but it would be neat. :)