I agree with Grknight... Unless we add another optional variable in a <a href="/wiki/Future_EAPI" title="Future EAPI">Future EAPI</a> update for the ebuild itself to include a a link to the package's relevant wiki page. =)

For now the best way to is to actually search the wiki for the package itself, which is exactly what the link on packages.g.o does when you click the "Documentation" link.