Cabrinha have released their new "backless" bindings, called the Sync.   What appears to be a crossover between traditional foot straps and boots, the Sync's fully enclose the front of the foot, with adjustable laces.

The Sync's will retail for around $180.

Discussion of whether they are called "bindings" or "straps" have been spirited in the forums, checkout the official Cabrinha video on what they can do for you...