Showstreet is a New Zealand Google Maps mashup that allows users to navigate a street level photographic view of shops and businesses in Auckland and to get details about individual stores by clicking on interactive links.
The screencast below gives a good overview of Showstreet's features,
Navigating Showstreet is pretty intuitive. Streets that have Showstreet coverage are shown on the map in blue. Click on a blue line to load the street view imagery. You can then drag the image, use the arrows at the side of the image or drag the female shopper icon to move along the street.
Businesses can sign up with Showstreet and have interior panoramic images of their stores appear on the map. Registered businesses can even log in and edit business details and post specials and updates.