Mapquest Streetview (called 360) - Street Level Imagery

Mapquest Streetview (called 360) - Street Level Imagery

You can now view MapQuest Maps in a whole new way. We have developed a simple, easy-to-use interface that fits seamlessly into the MapQuest mapping experience you have come to know and understand. 360 View provides fantastic panoramic views (360° horizontally and 160° vertically) of any given image within the 360 View coverage area
*selective USA Cities only

orange glow represents 360 street level imagery available when the '360 view' option is on.

The quality of the imagery is not as high resolution as Google (Streetview) or Bing Streetside but then they require post-processing bluring faces, mapquest does not.
The Orange 'bubbles in' 360 mode could be made transparent but do indicate direction of the next photo in a simple manner.


Mapquest API
currently 360 mode is not available in the mapquest api
http://developer.mapquest.com/web/products/beta-releases

source:
http://blog.mapquest.com/2009/12/11/street-level-imagery-comes-to-mapquest-com-as-360-view/
screen shots:
http://www.mapquest.com/360-details