Lifepod on Friday opened sales of the Rock Steady. Said to recall classic gym bags, the bag holds a special compartment for an iPod or any other digital audio player that connects to the bag's built-in, three-satellite speakers while leaving ample room in the bag itself. A set of external controls on the outside give basic adjustment of the sound without having to reach for the player inside. The stereo delivers three watts of sustained power and will run for "hours" on four AA batteries, according to the company. The Rock Steady is available in several different two-tone colors ranging from black and white to an overt gold and platinum scheme and sells today for $130. [via Brandish]