The available VCDX defense dates (and locations) for 2014 are been recently announced on a thread in the VMware Community. Some were already well know (during the PEX event). The interesting aspect is that there are more locations (basically one per main Region) and that (actually) seems that there is no plan to bring the defence during the VMworld (not a new idea, but this time make sense, considering the better proposal of dates and places).