iPod shuffle were any more portable it'd be an implant. While bigger than the shuffle, the Mobile Cruizer from Japan's Diatec could still be of benefit to those on the go. For ¥3,400 or about $29, you get the convenience of being able to charge from any wall outlet -- no bigazz desktop or laptop required. Disconnect the "brick" and you can even charge 'n sync over USB when jacked into the computer. Goes live in Japan within the next few weeks.