This is really becoming annoying, now. After days of hearing that Canon is fighting to get an extension to the NDA of the photo press, it seems that several elements point to a further delay (compared to the previously probable launch date of 17th September).
French magazine Réponse Photo has delayed its parution date to 23rd possibly to wait for the revelation of a yet-unannouced camera (obviously it could only be from Nikon or Canon).
It is quite possible that Canon is trying to arrive after the Nikon announcement of its 24,6MP Full Frame camera (Nikon D800 or Nikon D900, maybe?), scheduled for 18th of September.