Having done some very rudimentary testing, it appears that lyx (and deps) work on ppc64. The following needed to be keyworded : app-office/lyx dev-tex/chktex dev-tex/dvipost app-text/noweb (note: this is my first keyword bug - if it should be different, let me know)
thanks! added ~ppc64. will go stable in ~30 days. your bug report is 100% ok. though you *could* assign keywording bugs for ppc64 directly to ppc64@gentoo.org :-)