There are Worlds all around and Pocket Worlds lets you get immersed in them.

You have to physically turn all around and move the device up and down to get the whole view. A first series of twenty images from the Panoscopic Journal by Luc Courchesne (1) can be viewed as it you were still physically standing where they were recorded.

This application uses the compass on the 3GS to pan left and right as you turn around, and the accelorometer to move up and down. On iPhone 3G and 2G, and on the iPod Touch (models without compass), you can swipe your finger left and right to pan.