On Sun, 31 Aug 2008 16:26:46 -0700 (PDT), rjn
wrote:

At what point is it more than just a gap?

Essentially, when Congress says it is.

At some point it might be cheaper to re-create the F-1.

No need. A Delta IV-Heavy with modest modification (much less than the
work needed for Ares I or an F-1-based booster) can launch an Orion to
ISS.

Brian