A cloud map?
The solution, created by Stamen Design’s Michal Migurski, uses Mapnik (an open source GIS toolkit) and Open Street Map data. Mapnik, especially, is notoriously difficult to get working correctly. With the Amazon image created by Migurski, everything is ready to go. All you need to do is tell it which Open Street Map file and stylesheet to use–and Tile Drawer makes several examples available. [...]
Read more: http://blog.programmableweb.com/2009/08/28/create-customized-maps-in-the-cloud-with-amazon-ec2-and-tile-drawer/