Yes, wind can travel faster than the speed of sound. Wind is just the bulk movement of a mass of air through space and is in principle no different from a train speeding along or a comet zipping through space.
The answer to this question is unsurprisingly, yes. Wind is just a bulk movement of mass in air. The extent to this is if sound is heading towards the wind. If sound is going with the wind, it would extend the sound further.
