To avoid further problems when a mirror goes down, we are in the process of setting up a round-robin based master feed which redirects to one of the working mirrors transparently to the user.
If one of the mirrors goes down again, the user won't notice a thing and does not have to edit his ipkg.conf.
We could, however, use another mirror, or two
If you are interested in setting up a mirror, and you can push ~10-20G / month and have ~5G of free HDD space, join #openzaurus and let us know.