The weather resistant Tivoli iSongbook is a light weight compact stereo with a hidden iPod dock. Just flip open the hidden dock, place in any docking iPod, and you can control the iPod and iSong book with the included credit card sized remote. A second corded speaker is included and can be placed up to 6’ feet away. Can be powered by AC or 6 AA batteries, comes in black or white and weighs 3lbs.
Available here for $329 (ouch!).