During his recent trip to PhotoPlus Expo in New York, The Mac Observer’s John F. Braun learned how to expand your iPhone’s photographic capabilities with the Schneider iPro Lens System. The kit includes lenses, a case and a stand to help improve the quality of the photos you snap with your iPhone 4 or iPhone 4S.
The Camera Finder page on flickr.com has some very telling data.
First of all, the most popular camera overall in the Flickr Community is the Apple iPhone 3G. That's more popular than any Canon or Nikon.
That right there is a pretty amazing and telling fact. Of course we have to keep in mind that the nature of the iPhone is that has the capability of sending pictures directly to Flickr. If the DSLR and Point and Shoot cameras had this capability, they would surely dwarf the iPhone as certainly if you look at the numbers of actual photos that are taken with regular cameras must be orders of magnitude larger than with camera phones.
I did notice that the Apple iPhoone 3G line flattened and even started to drop. This next graph might explain that. The iPhone 3GS seems to be taking over.

Another important note that Flickr has on this page.
The graphs are only accurate to the extent that we can automatically detect the camera used to take the photo or shoot the video (about 2/3rds of the time). That is not usually possible with cameraphones, therefore they are under-represented.
Regardless, the trends are all very positive toward more and more actual photography being done with Cameraphones. And this will only continue, especially as cameras improve on our smartphones.