BetaLabs has released Nokia Maps 3.0 for testing.  Some of the major improvements from 2.0 include:

• The 2D/3D Map Hybrid allows for better views of the streets and surroundings
• Buildings and other locations are more clearly marked
• Train Maps! 
• Walk has been improved allowing Nokia Maps to navigate users not only through streets by parks, side streets, non pedestrian areas

http://www.nokia.com/betalabs/maps