The ZonePlayer S5 launch was an important milestone for Sonos as it attempts to bring down the cost (and raise the appeal) of its excellent whole-home music delivery system. Now we've got a bit of good news for those of you who already picked up a few of the $399 all-in-one wireless speakers we reviewed back in October. A 3.2 software update for the Sonos controller and iPod touch / iPhone apps will be released sometime this month letting you assign left and right audio channels to a pair of S5 speakers. The result should be impressive since the portable units can already
