|  I believe pkgsrc does not add new categories without some number of
|  appropriate packages (how many?) available.

  There are already a number of packages which could go in the
"voip" category: kphone, skype, openam, gnugk, speakfreely, xspeakfreely,
openh323. Not sure whether that is enough, but it nears the number
of packages in "mbone", and I anticipate voip getting more widespread
over the next couple of years.

	mjl