We have seen photos of parts that have been said to have a new dock connector and a repositioned headphone jack to have all devices similar in ports.
New leaked parts for what is said to be the new iPad mini and the new iPhone have been released. High res shots of the dock connector reveals a smaller 8 pin dock that is rumored for all the upcoming iOS devices.
A new dock connector seems to worry a lot of people with accessories for the current dock connector. Hopefully for all of you Apple will release an adaptor like they did with Magsafe to Magsafe 2.