Google has just announced a new layer for its Google Earth application: Ancient Rome 3D. The layer allows users to move through a virtual rendering of Ancient Rome as it looked in 320 AD. The new historical layer sports information about locations of historical significance and even full interiors of some buildings.
Google is also sponsoring a Rome Curriculum Competition for educators to encourage use of the tools Google has available in classroom learning. I only wish this had been around when I was struggling my way through "History of Italy" in college.