While browsing my favorite online computer store (Multiwave - mwave.com), I found this portible iPod speaker dock. There also is a generic mp3 player speaker dock.

Interesting idea. A chance to strengthen the Rio brand by having some audio makers come out with a Rio portable speaker dock? But with the case of each Rio being so different, it'd be tough to make a one-size-fits-all Rio speaker dock. Maybe just a Karma dock? One with adjustable grip or plastic finger grip to take any size? Hm...