We've heard a lot about the Verizon iPhone lately, but this leak from BGR is by far the most interesting rumor. Apparently, model 3,2 of the iPhone is now in the AP testing stage. This is the final phase of testing prior to release.
This new unit packs a SIM card slot, which means it might be a CDMA + GSM/HSPA device. iPhone 3,2 could be the fabled World iPhone, capable of working on almost every carrier. It could also be a CDMA phone, still bound for Verizon, with global roaming capabilities. If the SIM slot rumors turn out to be false, 3,2 could just be a slightly modified version of the iPhone 4 with a better antenna.