hmmm... i am not so sure anymore about that Eric.
I stumbled upon some sites that give me the feeling that its google technology. For the interface at least. I believe the rest comes from another data provider. For me that will not be usefull because i am planning to do it for an island...which means i have to order the satellite pictures from a satellite operator.

however, if you look here, its sure looks like you can use the google map interface with other data.

here is an example where someone put in another map of his own:

http://www.econym.demon.co.uk/google...tommapnice.htm

and here is an example where someone has been modifying the controls of the google map. (see how its blue)

http://www.toeat.com/

Anyways, if you are still convinced that its not map.google technology, let me know. I am also still looking around. Thanks for your advise though Eric.