At Photokina Olympus showed a new camera module concept with an interchangeable Micro Four Thirds mount called Olympus Open Platform. The camera module can be used with a smart phone (via Wi-Fi connection) similar to the Sony QX1 camera. There no additional information for now, but you check out the new Olympus Open Platform website here.
Update - here is a new picture of the Olympus Open Platform camera:
Via Engadget
