If you frequent small house parties like us, chances are you would've witnessed the many occasions where guests take turns to hook up their iDevices to the speakers; if not, just picture yourself fighting your flatmates over your communal HiFi system -- Altec Lansing claims that on average there are 2.2 portable audio devices per household, and they're most likely iPods. Naturally, a dual-docking speaker -- which is nothing new -- would somewhat ease domestic tension and reduce interruption to the tunes, but think smarter: what if you could let music alternate between the devices,
