Creative's ZiiSound D5 ($300) is actually one of the most interestingly designed speakers we've seen in a long time: shaped like a slightly slanted box with chrome sides, the unit has a very unusual dock in the back. As it turns out, ZiiSound D5 is a completely wireless system, pairing with stereo Bluetooth devices instantly, or using an included audio and remote control dongle with the iPod, iPhone, or iPad. If the dongle's attached, you can also…