At least according to B&H (Click here) we are exactly one month away from the first Olympus E-M5 shipment. But seeing that the E-M5 still remains within the top list at Amazon (pre-)order rankings (Click here to see it) I doubt you will get the camera on that day
Anyway...
Read more http://www.43rumors.com/olympus-e-m5-gets-tested-by-germans-beats-samsung-aps-c-sensors/