Sharper Image (actually ENE, a company that sells under the Sharper Image brand) has just released what they call the SoundBag. It is a backpack that is said to improve the listening experience for people on the go. It incorporates a detachable flat panel speaker system that
is made from fabric, making it hard to distinguish from other parts of the bag.
The bag features an adjustable shoulder strap that includes a 3.5mm plug, a built in stand so that the speaker can be used separately and an auxiliary input. It runs on 3 AA batteries that should provide 8-10 hours of playback.
The SoundBag retails for $99, and is now available in many colors from major retailers.