I love that this uses OpenStreetMap instead of Google Maps, as I like being able to control all my own data and not be reliant upon MegaCorp (TM) for my site to function. At the same time, I've never seen an OSM API that seemed both as useful and as simple as the Google Maps API, but this looks pretty nice.

I may have to wipe the dust off RateMyStudentRental.com and retrofit Leaflet at some point.