Space.com is carrying this article discussing NASA's intention to have a "backup" shuttle ready for the first two shuttle missions once they start flying again. If something goes wrong, the goal is for a "rescue" to be mounted before supplies run out on the one in orbit.
As if NASA didn't have enough stuff to spend money on already. Lord knows how much extra it'll cost to have two white elephants in motion at the same time. For awhile there in the 1980s it wasn't uncommon to have shuttles on both launch pads at the same time, launching them (when nothing went wrong) within a month of each other. Looks like those times are here again.
On a related note, during the Apollo 13 crisis, my dad says that NASA started a giant push to get Apollo 14 rolled out to stage a rescue. They called it off when it was realized that even pulling out all the stops would not have a spacecraft ready before supplies ran out on 13. But it was a wild experience.
Personally, all I can say is go Rutan, go!