It will be a while before it gets compiled by default, but nonetheless, a new desktop project was added recently as well: Mixer [1]. It probably supports NetBSD only so far (in fact maybe Solaris too). Anyway, as already described on my blog [2], it may prove useful to NetBSD users anyway.

[1] http://www.defora.org/os/project/display/3305/Mixer
[2] http://people.defora.org/~khorben/place/blog/75/A-graphical-mixer-for-NetBSD