The iPhone 4 should soon carry the distinction of being the most popular camera on Flickr. The Yahoo-owned site's Camera Finder shows Apple's phone on the verge of overtaking the Nikon D90 and having already passed Canon's EOS 5D Mark II, Rebel T1i, and Rebel XSi. Without timestamps, it's unclear exactly when the shift began, but it followed after a surge a significant amount of time after the iPhone 4 was on sale.
