At CES 2008, Belkin has taken the shrink wrap off, of some of it's newest iPod/iPhone accessories, firstly there's a new upgraded FM transmitter; the TuneBase FM and TuneCast auto, both use ClearScan technology to seek out the best frequency to transmit on.
Also Belkin has shown off the RockStar, which is a device that allows numerous iPod's and listens to be connected together via a "Hub" so users can listen to each others music, or it even allows you to use numerous iPods to mix music together, how well the latter works is at the moment just pure speculation.