The current guide mentions pac-sources both as unsupported and no longer provided. It should probably be taken out of unsupported. Unsupported: The pac-sources kernel tree is patched with Bernhard Rosenkraenzer's (bero) patches. Be warned that this kernel is quite out of date and may be removed from Portage soon. No longer provided: pac-sources, a kernel designed to enhance multimedia performance, has been superseded by development work in the 2.6 development branch.
i punted pac-sources as well as a bunch of other ones that are long dead thanks ! :)