The widespread adoption of the iPhone leads to unexpected consequences. For example, people are very actively using it as a camera.
Statistics of photo hosting Flickr shows that the iPhone is not only an order of magnitude ahead of the popularity of all other smartphones, but it went around all DSLR, except for Canon 400D (Rebel XTi).
Literally, over the past month or two, the iPhone has caught up with Nikon D80 and Canon 40D in popularity and, judging by the trend, should be ahead of them in the very near future.

True, the schedule for each day is calculated not by the total number of photos, but by the number of users with a particular camera model who uploaded at least one photo. In fact, the base "Flicker" has 51 million photos of the Canon 400D and only 5.8 million shots from iPhones.
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One way or another, but never in the history of cameraphones has a single model been able to achieve such popularity as a camera.

via
CNet