the lack of a pkgbuild is what annoys me
Downloading and running one script from that directory is simpler (imo) than installing multiple testing packages that will conflict with the current official releases. That said, there is nothing stopping anyone from making a PKGBUILD. The archive will remain unversioned but the URL is constant. If you or someone else wants to make that happen then I can include the various setup.py scripts in the testing archive.
Really I just need to get around to releasing it but real life is far more pressing right now. Sorry for the delay.