On a download page for a project, there is generally a list of links to download the binary packages for the various distributions. However, for a project that is already in portage, there really isn't anything to link to for Gentoo. For instance, http://amarok.kde.org/wiki/index.php/Download links to http://packages.gentoo.org/search/?sstring=amarok which isn't really ideal. Basically I envision a short paragraph with the commands necesary to install a given package, perhaps with a link to extra instructions to install masked packages if necesary.
Ian, The command neccessary to install a particular package are all the same, and adequately documented within the system as well as gentoo.org. I agree, there really isn't anything to link to for Gentoo. Those sites that choose to link to packages.gentoo.org do so at their will. Some sites will actually say 'emerge <pkg>'. When all else fails, use common sense.
