A Radio Shack flier circulated this weekend featured an image of a jailbroken iPod touch. The picture shows both the Installer.app and MobileChat (an instant messaging application) icons, programs that are found only on jailbroken units. Scientists from IBM have announced a new storage technology called “racetrack,” which would enable a device such as an iPod to hold about half a million songs, or 3,500 films, and cost less to produce.…