Switronix has released an adapter to power a Canon 5D Mark II or 7D off a power tap. It is a simple adapter called the XP-DSLR-C that allows users to adapt the Canon DC coupler directly to a battery or other source with a power tap plug. So an Anton Bauer Gold Mount will work as well as the D-Tap found on an IDX battery. This will greatly extend the battery life of the cameras, and the adapter has an additional power tap on it to power other 12V accessories. Look for an adapter for the Panasonic Lumix GH1 in the future as well.