If Streetview coming in firmware 2.2 isn't enough for you and you need something Google-made to play with grab a copy of Google Earth from the AppStore. Google sure has been busy lately.
Google Earth is a nice little bit of technology allowing you to view the world via a combination of satellite and aerial images. This port by google to the iPhone has been done quite well and it's an entertaining little app.
Just search for a location or place on the Earth or click locate me and Google Earth takes you to the corresponding part of the world showing you pictures or 3d rendering of the area. Controls are pretty simple to use. Pinch and pull.