I was looking into this for iOS as well, and I noticed that RevMob has a lot of installation instructions for various engines. Unity, Corona, Gideros, etc....
Since they seem to be reaching out and wanting to cover many engines, I emailed them about a Stencyl extension. I think if more of us do so, that they will take notice and possibly release an official one. Especially if someone like Jon could reach out directly and offer them help/access to do so.