xmms-shn is currently in ~arch, but I have the feeling it might not have been verified by arch maintainers as I just noticed that it borks on sparc and the Changelog never mentions arch verification. I've uploaded the test file I use for shn here: http://dev.gentoo.org/~eradicator/srv1988-07-03t01.shn Thanks.
Works on ~ppc.
2.2.8 and 2.4.0 both work on mips after enabling the "Swap audio bytes" option in the plugins configuration.
Works on alpha.
Working on getting this bug fixed now. After that, I might fix the package/keywording too. :)
Finally stable.