Why rule out Sea Launch? It looks small enough.
Because Sea Launch is not going to let a competitor use its facilities and there are ITAR issues.
Uhm, I think he meant "sea-launch" as in floating launch Jim. In answer to the question though don't think "air-breathing" is compatable with sea-launch.
It is "just" a conception art at this point (I think?) but I'm not sure how much "help" simple ramjets would be and it doesn't actually look like the "inlets" feed into the plug-nozzle but have their own exhaust outlets. Frankly I don't think the art helps us with anything and, well, uhm... Oh heck! Markusic get back here and start devulging company secrets! Stat!

(And welcome to the forums)
(I wonder if I can get these guys to steal my or Dani Edar's "Jet-booster" ideas! Please?

)
Randy