Sony has unveiled two new audio systems for the iPod, one offering multi-room wireless audio, the other dual iPod docks for DJ-style mixing. The Sony S-AIRPLAY system employs Sony’s S-Air technology to wirelessly transmit audio from the system’s main docking station to separate S-Air wireless speakers. The system includes one docking station, which features a built-in iPod dock, an AM/FM tuner, a dual source to allow one speaker to…