For your viewing pleasure, Welsh mistranscriptions notwithstanding, the Bryn-y-gaer cemetery (near Penderyn and Hirwaun) is now online containing transcripts and images of all headstones, with the exception of the two modern sections:
www liber-mortuorum com brynygaer
Sorry this link is no longer working
This is a big one so the page takes a while to load (200k index file). Listings are ordered by the way I took the photographs, and by surname.
The OGRE