Location is always an important part of a job seekers search. I’m starting to see more job boards recognize this by adding maps to their sites to aid candidates. This “visual cue” is a great feature to have in a world which is becoming more visual.
Here’s a look at what Jobing does;
Google maps is a great place to start. Here’s a link to their API guidelines to get started.
NOTE: There is a sites called JobCompass.net which launched a few years ago based around the maps content.