From a review on the Cool Tools website of the Tivoli PAL unit, this cool little box is $129.99 from Amazon.com, which can plug into your iPod for an portable stereo experience.
“Several readers turned me onto the Tivoli PAL unit. This is a weatherized, rubber-coated radio/speaker that accepts an iPod (or any other music device with a mini-plug). The tiny PAL has an amazing rich and deep sound. You plug an iPod in, turn up the volume, and it uses its internal rechargeable battery to play your musical playlists longer than your iPod battery will last (I can get 8 hours on the PAL in one charge). Clear, marvelous sound from a small, rugged box that has survived rain and being dropped into a pool. That doesn’t usually happen because it is carefully designed with handy finger grips and a grippy covering. It comes with an adapter for running on AC. You have a choice of many bright colors, among them on iPod-ish pearl white — that version is now being sold as the iPAL (identical in all other respects to regular PALs.) With the same sonic guts as the Henry Kloss Tivoli One model, this cool unit gets rave reviews by audio snobs for its great sound. Its actually better than the built-in stereo in my office. And it serves as a highly sensitive FM/AM radio, too.”