We like to say that radio is the original social media. Did you know that it’s also the last remaining analog medium in the U.S.? There has been a big push the last several years to bring radio “Into Tomorrow” and iBiquity is the company that is bringing radio into the digital age, with their HD Radio service. We caught up recently with the president of iBiquity to get a look at how they are changing the way we listen to (and interact with) our radios. Also, Chris Graveline takes a look back at the birth of the world’s most popular social media site with “This Week in Tech History. “