Via the Google  blog, details of Google Maps Mobile 5 for Android OS and two significant new features: 3D interaction and offline reliability

Via the Google blog... we’ll use vector graphics to dynamically draw the map on your device as you use it, allowing you to interact with it in new ways:

• Tilting: Drag down with two fingers to tilt the map. Tilt while zoomed in on one of the 100+ cities around the world with 3D buildings to see a skyline spring to life.
• Rotating: Twist with two fingers to rotate the map. After tilting to see 3D buildings, rotate around them to gain a new perspective from any direction.
• Smooth zooming: Slide two fingers together or apart, and see the map and labels continuously scale to any zoom level, stopping when your fingers stop.
• Compass mode: Center the map on your location, and then tap the compass button in the top right corner. The map will flip into 3D mode and start rotating to match your perspective, while still keeping all the labels upright and readable.