[Crazy-simple and robust-looking solution][link] for hosting your own [OpenStreetMap][osm] instance on EC2, with custom overlays. via [Andy Baio][andy].
[link]: http://tiledrawer.com/ “Tile Drawer”
[andy]: http://waxy.org “Waxy.org”
[osm]: http://www.openstreetmap.org/ “OpenStreetMap”