Oh yes... Dennis Weaver, groveling worshipers, the whole Biotechture company... those are the aspects of Earthships I really could care less about! Still, it's part of it all, which is why prefer Earthship INSPIRED stuff.
Yeay to the mountains of Oaxaca! I'm actually thinking of checking out San Mateo pretty soon. Heard lots of great things about it.
Oh, well! You should definitely check out San Sebastian Rio Hondo, which is near San Mateo. Quite a gathering of expats there, doing some good things. Sadly, there's been a lot of deforestation in that area of late. I also stayed for awhile in Capulalpam, another very beautiful mountain pueblo SE of Oaxaca (near Ixtlan de Juarez). So many beautiful places!
Yes, I've heard of San Sebastian, though never visited. It's also up there in the San José del Pacifico area. Deforestation? That only calls for REforestation, so again an opportunity for doing good things. However, Capulalpam I've never heard of, so I may go to check it out some (other) time.