http://www.armadilloaerospace.com/n....ws?news_id=296

Alas, it appears the dream of a simple liquid monoprop powered RLV
(even suborbital) is dead for now.

Armadillo is now switching to LOX /Methane. They're still building
everything themselves, which should be even more fascinating to follow
than their previous efforts if John Carmack keeps up his prior openness
about development.

I can't wait to see how they manage gimbaling.

Tom Cuddihy