I've discussed this with Diego and Roy today, the only 2 persons who had such systems. The end result was that there's no developers for the arch, and we can let it die. It was a nice experiment but didn't fly.
So in conclusion I've removed the profiles from profiles.desc, so repoman won't complain about it. All this spawned from the fact that dev-lang/python is now using external toolchain package, dev-libs/libffi, which nobody can test. So, if you can't have libffi, you can't have python and you can't have portage. -Samuli