These plaques are terrific! I managed the project in Massachusetts, where JGSGB has posted nearly 80,000 plaques on jewishgen, and is trying to expand to the other New England states.
You might be interested in the origin of this project, which is clearly the younger sibiing of JOWBR. It was the idea of Warren Blatt, the previous head of JewishGen (who came from Mass), who noticed that his parents had put up yahrzeit plaques for his grandparents, who never came to this country.
I strongly encourage genealogists in other states to undertake this work!
Carol Isenberg Clingan