iSkin's music product line is called Cerulean, the most flexible configuration of which is the $129 TX+RX (transmitter / receiver). The transmitter, like those bundled with iPod wireless headphones for years, allows you to use your iPod as a remote, sending music to any Bluetooth stereo speaker. But not only does Cerulean free the iPod from the dock, it frees the dock from the iPod.
Plugging the Cerulean Bluetooth receiver into practically any iPod dock opens a door for many Bluetooth stereo music sources -- such as MacBooks and notebook PCs, digital music players from Sony and Samsung, and many cell phones. When used with a subscription service such as Rhapsody, the Cerulean lets you create playlists from thousands of songs or listen to YouTube music videos on your notebook with better audio quality, but there's even one more trick up its sleeve.