[hoagy62]

I’d prefer that some private corporation out there step it up and develop an SSTO (Single-Stage-To-Orbit) craft capable of carrying cargo and/or passengers.

[Young Werther]

The Venturestar was one such candidate

http://en.wikipedia.org/wiki/VentureStar

It was cancelled and the next generation Aerospke engine, though proven is sitting on the shelf unused!