Really cool project on Codeplex to make available maps from across the globe, beyond the out-of-the-box maps that you see in Report Builder today: http://mapgallery.codeplex.com/
This is a copy & paste right from the Codeplex project site:
MapGallery of Reporting Services in SQL Server 2008 R2
World map separeted by countries, able to join Map Gallery in Reporting Services inside SQL Server 2008 R2. Join us, and make your country in this world map.
Everyone can upload your own country map
By default, only USA maps came with Reporting Services. This proposal is make a world map to use for all in Reporting Services.