We've seen consumer level tether-actuated airbag jackets, but Dainese's D-air system intends to target the other end of the market: hardcore motorcycle racers.
Incorporating three accelerometers and a GPS unit into an aerodynamic appendage, the lithium-polymer battery-powered system ignites in 40 milliseconds using an inert pyrotechnic gas. 37 liters of air fill a protective sack that surrounds the shoulder and neck area, and according to Dainese, "Once the bag has inflated, the appendage can be easily removed by a quick gesture of the rider, who can then resume the race." The system can also record up to 10 hours of riding dynamics data.
While considerably more complex than the consumer airbag jacket, successful tests at last year's GP races at Valencia suggest this system will find its way into production... and eventually, the consumer market.
Check out Dainese's website for video footage and more on D-air.