Ubanana offers what looks to be a stylish neck worn waterproof mp3 player for sports.

The Ubanana uCan features 1GB of storage, 15 hours of playtime and MP3 and WMA playback. The uCan mp3 player floats on water, so it does not get lost that easily.
The Ubanana uCan is supposed to ship in July and pre-order is available for 99 Euro. The images shown of the uCan mp3 player are just rendered. I am always a bit cautious, when I do not see real photos of a product. So proceed on your own risk, if you decide to pre-order this product.
More details on the Ubanana site.