The Cameramator plugs into most newer DLSRs from Canon and Nikon via USB. It links to an iOS device via Bluetooth for some interesting functions. For example, and iPad or iPhone can be used as a monitor for photo shoots. Also the app can control the camera remotely, perhaps allowing for it to be mounted. Also once photos are on the iOS device, they can be shared or manipulated.
The Cameramator is available now and sells for $300.