Microsoft Tell Developer To Keep Mango A Low Profile

Microsoft has told developer to keep quiet of what can be found in Mango update which was leak before that says the possibility of a front facing camera. Other than that nothing is known, so will the developer keep leaking things out or follow Microsoft? Just keep things leaking out while keeping low profile, also some says that Facebook integration is very deep in Windows Phone that the Facebook calendar will be automatically sync with the Windows Phone calendar