[TrevorJ]

Seems like a really interesting idea. For now I've got my money on SpaceX in terms of decreasing the cost to orbit first, they have the hardware already up and flying, and it's a bit less exotic so the engineering issues may be more well understood.

[legomaster]

I agree, I think SpaceX will have re-usable rockets with the Falcon 9 long before this is working. But I believe you could extend the jet-powered-rockets to larger launch vehicles than you could the tech in the Falcon 9. Plus, the tech might be able to be extended to have cheaper super-sonic flights. But that's long ways down the road.

[TrevorJ]

I agree, it's quite an exciting proposition if we can get a real space plane.