I've had this idea sitting in the back of my brain for several years and I haven't had time to figure it out: a system of building blocks that process OSM data streams. e.g. Listen to changes to find new mappers. Connect new mappers output to emailer to get alerted of new users. Pass it through a geometry builder and location filter to get new user alerts near you.
The local radio station added .1 http://www.citypages.com/music/cities-97-dramatically-rebrands-as-cities-971/491288781
Hey tech friends, this is a great list idea and I think it'd be cool if we helped build it out - if you can contribute info on "tech conferences that offer childcare", throw a PR or two at it:
https://github.com/krantzinator/tech-conferences-with-childcare
Maps, Data, Resistance. Helps with OpenStreetMap US, started OpenAddresses.