Way back in February, iMore learned Apple was planning to ditch the traditional Dock connector to go with something smaller. With the next iPhone, new technologies like LTE 4G networking will need every millimeter and milliamp of battery they can get, while AirPlay and Wi-Fi sync are reducing the need for physical cables.
The moment rumors of a new Dock port emerged, many expressed hope it would feature a MagSafe-style connector, like Apple's MacBook line of laptops. Symmetrical, it could be plugged in without worrying about up or down, and magnetically coupled for better ease of use. Others simply wanted to make sure all their old Dock accessories would still be compatible and still work.
Compatibility is an easier topic to look into, if only slightly...