Wim Decree designed a binding that released, in theory, from every direction. He used a Voile ball and socket release for the front of the binding. (http://www.backcountry.com/voile-release-kit-w-brake) And used a spring loaded release in the back. I skied on his binding for a few seasons and it worked great. Some higher quality parts for the rear release would make for the safest binding on the market, in my opinion.
I thought about putting a Voile release on the front a Reflex plate. Would be a fun project.