Was walking through the south hall show floor when I was stopped by a thumping bass. It turned out to be an iPod base and speaker system called Tango made by XtremeMac. It has three speakers, an independently-driven subwoofer and wireless remote. It also charges the iPod. At $199, it's pretty competitive with products like the Bose SoundDock. The Tango comes out in March.
XtremeMac Tango [Official product page]