I had understood that another use-case for such a database is when an
external organisation (e.g. a local library in some city where there is no Chapter presence) asks for a local Wikimedian to come and give a presentation or advice on how to get involved. Such a database (IIRC) should be able to produce a list of people who a) live in that local area, b) are happy/able to give public presentations and c) know about the specific subject being requested e.g. Wikisource.
-Liam wittylama.com/blog Peace, love & metadata
Sure. There are about a bajillion use cases for it. :)
pb