You could also make this data available as a Public Google Map. That would allow Google Maps users to overlay your data as they make travel plans. This will also work in Google Maps for Android!
It's kind of sparse right now, but all new jobs listed will be geotagged, so it'll get better over time.
It's crazy how concentrated the jobs in SF/NY are though. I'm not sure how much of that is a function of the demographic of Gun.io rather than the actual situation.