@Edent FWIW I've been working on Postmarks a bit, which also used Darius' Express AP server initially, so may be interested in having a prod here. Plus I share the interest in old 4sq, current OSM, etc. Funny, didn't we talk about this idea (on Mastodon), about a week ago...
@Edent also this would be a great thing to talk about at #Fediforum... @fediforum