That would be fantastic. It would be so cool if you could launch a python, or even java dyno. I think most webapps could be structured to fit into this architecture, with the caveat of using ruby specific management tools such as rake.
I highly doubt they'll want to or be able to spend much time getting other "dyno"'s working until they've got a solid customer base with RoR. No reason to spread themselves too thin until they can demonstrate they can serve their customers well with what they already have.
