Street View & Oblique View Driving Demo
One of my favourite examples in the Google Maps API Demo Gallery is Thor Mitchell's Street View with Driving Directions. The demo shows how to integrate Street View with driving directions.
With Google's recent addition of oblique view to the Maps API it is now possible to synchronise the map view with the Street View direction. I've hacked Thor's example so that now as you play a driving route in Street View the map will rotate to face the direction that you are driving.
In the demo just press 'route' and then 'drive'. Oblique view is currently only available in San Jose and San Diego