Bloomberg Business has the details about how Amazon is ramping up investment in podcasts and other radio-style shows. The online company offers the audio programming through Audible, which it acquired in 2008. Audible is recruiting for about 100 positions worldwide. Former NPR executive Eric Nuzum is overseeing development and production of original programming for Audible. He’s hired producers from WNYC and the show Fresh Air. Audible has already recruited comedians and radio and podcast producers for its push into audio world.