I have had ypbind and yptools running for a long time on my hppa box without any issues. I would be nice to have it at least marked ~ so I don´t have tom mess with portage overlays. Version used are yptools-2.9 and ypbind-1.19.1-r1 Reproducible: Always
Marked ~hppa: net-nds/yp-tools-2.9 net-nds/ypbind-1.19.1-r1 Please note that you can also add lines like these: net-nds/ypbind x86 net-nds/yp-tools x86 to /etc/portage/package.keywords if you want to avoid adjusting separate ebuilds in an overlay - these lines would do exactly what you wanted.
Oh. and closing the bug. Thanks for reporting this! :)