Hmm, is this perhaps a viable option for a portable speaker? Sound quality reviews, anyone?

No bigger than a credit card and as thick as a blister pack of chewing gum, the Card Speaker puts most every mp3 accessory to shame with its good looks and crisp fidelity. Designed by IDEA International, this little speaker is ideally suited for trips to the park, the beach, or anywhere you�d like to share a little music on the fly. It comes in either black or silver, with a mirror-polished back, and includes a protective carrying case, a 3.5 mm connection plug, and a USB battery charge cable. The speaker has an operating time of approximately five hours on a two-hour charge