Sharp's CES introductions have continued with a major expansion of its iPod speaker dock line as well as two new 2.1-channel sound bars for home theaters. The DK-AP7N (not yet shown) is a folding yet subwoofer-equipped dock tailored both to listening to iPods and home as well as travel use; battery power lets it play sound for up to five hours before returning to an AC adapter. The stereo has DS