While in Best Buy the other day I came across an item called the Phillips ShoqBox. It is a 256 MB MP3 player with an FM tuner and a pair of very powerful for their size (about the size of a half dollar) speakers. The unit itself is not much bigger than (and comes with) a case that would hold a set of goggles. It has a 10 hour battery and an AC cord. The demo unit in the store put out alot of sound. This might be a natural for a velcro or magnetic temporary mount on a Burgman or many other bikes. If they would have had it in another color besides white I probably would have bought it to try. Price was 119.95. There is a great Flash demo for it on the Best Buy website.