Being the Microsoft Virtual Earth Platform Evangelist, I'm all about getting the word out about Microsoft mapping products. There is a greater good in what I do, however and that is to get people using mapping. Something like 82% of all data in the world...(read more)

"...how to use Microsoft Research's (MSR) MapCruncher to generate custom tile sets for use by the Google Map API"

Google Maps and Microsoft MapCruncher

also, another quote:

"Very happily, Google Maps and MS Virtual Earth use the same map projection and tiling scheme."