It was only Turkey, now they added all North America from Canada to Panama and rest of Europe, including EU. CIS maps seems to be separated. I guess that's because of topological map in middle zoom levels. It's based on Nokia NAVTEQ (which is also used by Bing and Yahoo). But map style looks much better than Bing's and Nokia's.
It's seems to be in beta. No satellite at the moment, no traffic as well.