Ah yes, I remember seeing his posts @mattclarke. And that's a really good example of using the Steem blockchain for "archival preservation." I could well imagine people interested in genealogy doing that for their families and family histories. One of the "weaknesses" of many conventional genealogy sites is that the amount of information you can record about a person/image is is often quite limited (500 characters, 1000 characters) so a genealogy app here could allow for the expansion of that.