Well, I've often thought about the feasibility of starting up a site which catalogues gravestones from graveyards around the country (even the world). When I visit a small graveyard, I photograph every gravestone in it, for future reference, and I often upload pictures of gravestones to my Ancestry tree. It would be great to have a national (or even international) site catalogueing photos of gravestones. However, the logistics of such an enterprise, and who would actually fund it, is always the stumbling block. I know that there are sites already with photos of local gravestones in some areas, but it would be great to have an archive, particularly since many stones will be unreadable in another 20 years, because the upkeep of some graveyards is so poor.