Individual Kindle users already have Whispernet, and Amazon has now announced another free service designed to make Kindles easier to manage for large organizations. Dubbed Whispercast, the service will let schools, businesses and other groups both distribute and manage the Kindles themselves and also distribute content to the devices. That includes the ability to control internet access on the devices (blocking the Twitter and Facebook integration, for instance), and the ability to distribute Kindle books and other documents to specific groups or classes. Amazon also says that it will "soon" include the ability to distribute apps to Kindle Fire tablets, as well an option for folks to bring their own dev