[krilnon]

In areas where Google already lets you view 3D imagery, it's already possible for them to show you a crude, continuous StreetView. It's just that the UI doesn't let you angle the camera such that it's oriented at street/eye-level

[zodiac]

I've built a prototype that uses the phone's accelerometer to control google maps so you get a kind of 3D street view, but it only looks nice if you set your own height to be a few stories high. You can angle the camera at eye level, but the buildings all obscure each other.