The latest report on the state of the camera affairs for the iPhone to come is that the current Apple supplier OmniVision is getting the bulk of 8MP camera sensor orders, 90%, while the rest will go to Sony.
This theory doesn't make much sense since we will have sensors with different characteristics, which could bring picture quality differences from one device to another, but still, this is just a rumor, and coming from DigiTimes at that, which is a hit-or-miss source. Nevertheless, we've come across this OmniVision/Sony split theory from at least one other analyst before.
Sony's backlit 8MP Exmor R camera sensor has already proven its capabilities in phones like the Sony Ericsson Xperia Arc, while the one from OmniVision is more obscure, but we know the sensor is backlit as well. Moreover, OmniVision already demonstrated its prowess by outing a 12.6MP sensor capable of Full HD video recording at 60fps
We should know where the truth lies around the end of the summer/beginning of fall, when the next iPhone is rumored to hit the streets.