I created my own implementation of the Leaflet javacript library as a wordpress plug-in for my front-end and it's working nicely by giving it the location data captured through MetaBox and the Location meta field captured in the back end.
It's very tailored to my specific needs but if I catch some time to refine it and clean it up I could share this back with the community.
I'm not sure this feature should be the in the MetaBox focus since it's really front-end stuff.