This was created by 6 shots on my iphone4 (non-S ;-) ) in HDR mode. I stitched them together using hugin later. I did have my phone stitch a similar image using the autostitch app which looked great too, but it lowers the resolution (probably a setting somewhere I should change). I slightly warmed the tone in Lightroom but otherwise this is as is. The image is about 12 MP resolution. Click on it for a much bigger view. It is quite impressive what you can do with a cellphone nowadays.
The Loch iPhone panorama. Buy a print.
relevant Google+ post.