iriver Japan and Speedo to sell a few MP3 players designed for underwater use. Yes friends, the Aquabeat you've grown to know, love and disassociate with overly tight swim trunks has a successor, the Speedo LZR Racer. Design wise, you won't notice a lot of differentiation from the first, but this waterproof-to-three-meters device has twice the internal memory (2GB) and a built-in rechargeable battery good for around eight hours of continuous playback. It's said to be shipping now in Japan for ¥12,800 ($128), though we hear it won't be coming to America without first nailing down a Michael Phelps endorsement. Not that said task will be too tough or anything.