The in development Views 3 supports the ability to query something other than a SQL database, such as a web service. For more information on this see http://developmentseed.org/blog/2009/feb/05/extendr-flickr-and-views.and a Flickr proof of concept at
For a future version (2.x perhaps?), I think this is where the Google Analytics API should be headed. Views integration would open up all kinds of integration possibilities and would allow all charting/mapping to be done via any visualization system that provides views display capabilities.