We love a tasty mélange of gadgets, and that's just what photographer / hacker David Hunt has served up with a Raspberry Pi board inserted into his DSLR's battery grip. He used the handle for power, while exposing the Pi's USB, network and video ports for easy on-camera access, and so far he's managed to transmit images via WiFi and ethernet. But the Raspbian Linux OS opens up a world of potential DIY accessories, like wireless tethered shooting (wi