Some links to sites offering general information about Ohio cemeteries:
From "Ohio Genealogical Society":
From "Cemetery Junction":
From "Cyndislist.com" - much general information about Ohio. Scroll down to:
"Records: Census, Cemeteries, Land, Obituaries, Personal, Taxes and Vital(Born, Married, Died & Buried)"
From "Random Acts of Genealogical Kindness" where you may find a volunteer who photographs tombstones: