A report by comScore found that Pandora and Twitter are the two most heavily indexed properties on a mobile device. Not surprisingly, older media properties like Viacom fall behind in mobile reach. Acording to AdAge, “the Media Metrix Multi-Platform -- which is still in beta -- found that a whopping 81.2% of Pandora's users access the music-streaming service from mobile devices.” The only newspaper to crack the top 30 was The New York Times, coming in at 15.