Just a heads up on something interesting: http://developer.amazonwebservices.com/connect/entry.jspa?externalID=2844
It’s a complete Open Street Map dump as an Amazon EBS PostGIS DB, meaning you can start an EC2 instance with PostGIS, mount this AWS public data EBS, run pg_createcluster, and away you go just like Google!
Well maybe you have to start up several dozen instances and seed a 1-20 zoom level tile pyramid first, but the point is you personally could have a global high quality map resource rivaling Google, Bing, and Yahoo. Reminds me of the heady days when a personal computer came in a kit, still some soldering to do but you get the idea.