It would be so much better with additional map sources, like google maps and bing (see MotionX for an example), with satellite maps too. It's annoying to quit Galileo to open other mapping apps.
Cheers
We can't use Google Maps as online map source due to restrictions on usage:
http://maps.google.com/help/legalnotices_maps.html
But you can create offline maps from 'custom map sources' (e.g. Google Maps) by yourself ;)
(read more: http://galileo-app.com/blog/custom-map-sources.html).