The Shuffle is no longer a speaker afterthought with the Travelsound i50. Corresponding to the small size of the Shuffle, the compact size makes for an easily portable set up. The rechargeable lithium battery has a 15 hour lifespan, and the USB cord charges both the speaker and the Shuffle at the same time.
Currently it's only available in Japan, for about $69, but it'll be available in other countries soon.
-Image from GeekSugar.