Amazon offers the Sonos Play:1 WiFi Speaker in Black or White (pictured) for $139.88 $136.99 with free shipping. That's the lowest price we could find now by $9, although we saw it for $21 less just before Black Friday. This humidity-resistant speaker can be linked with other Sonos speakers to provide stereo sound or music streaming to multiple rooms. Features include a 100Hz to 20kHz frequency response, WiFi, Ethernet, audio streaming via the Sonos Controller mobile app, and wall-mount compatibility.

Update: Black is now a few bucks more.