Google Earth photo viewing experience got the addition of panoramic images.
"People using Earth will find a new "Photos" layer that includes not only existing 2D photos from the Panoramio community, but also panoramic photos from around the world contributed by users of 360cities.net. These high-resolution panoramic photos are marked in Earth as red square icons. When you click on one of these icons, an info bubble containing an image appears, and clicking on the image again will take you into our photo viewing mode. You can then look around in 360-degree views and experience the place as if you're standing right at the center of it," explains Google.
To contribute your panoramic photos, visit 360cities.net.