Update your google maps app if you havent yet... the 3d buildings with gesture support has been added.
Via Gizmodo
• Maps load—and feel—faster
• Zooming is ultra-smooth, not point-by-point
• It can cache a
lot of the map offline, and it does, as you can see in the video, which was shot entirely in airplane mode. We're talking multiple zoom levels and a decent chunk of city geography. It'll even download fresh map data overnight while connected to Wi-Fi for places that you look up a lot in maps, Google tells us.
• Offline rerouting for navigation, even
• 3D buildings for 100 cities
• 3D compass
• Two new gestures: two-finger swipe to tilt the map and twist to rotate
Note: works perfectly on an EVO.. Works on Epic too, but rotating doesn't work (believe the same for all galaxy s and the nexus one). Less powerful devices aren't supported.