Yes, I found an online article outlining the half-dozen commercial vehicle concepts in development -- Hell, I say develop all of 'em! America's always been better off for having Chevies and Plymouths and Crosleys around as alternatives to the Model A.
I tend to lean toward the spaceplane and lifting-body models, myself. Spam-in-a-can is just a little bit Russianizing for my taste (not that there's anything wrong with that </off Jerry>). Put a pilot on the stick!
Well, I say whatever works to keep us going in a forward direction is ok in my book as far as our space program goes...
Spaceplanes and lifting bodies are good to LEO, and would not really help in Earth to Moon or Mars missions...
We need to develop that Heavy lift system to get some big stuff up into LEO and stage it there for trips out of Earths orbit...
But we all know who we can thank for screwing that idea up...