[rquesada]

This article (please read the whole article, including the PDF that is mentioned) mentions that Google might be "open" regarding the source code, but it is not open regarding which components can be replaced in Android.

It seems that Google doesn't allow the carries to replace the Google Location Service.

http://daringfireball.net/2010/09/the_welcome_to_android

[eli]

...if they want to use the Google trademark and have the non-open Google apps like Maps and GMail.