Ambient Space
   Broadcasting two music streams: one devoted to ambient and more traditional instrumentals and the other to beatless, drifting, atmospheric ambient music.
   http://ambient.00space.com/

Bluemars.org
   Featuring two streams from a large catalog of electronic and ambient music.
   http://www.bluemars.org/

DownTempo.org
   Downtempo music news and featuring the ambient music station, Afternoon Nap.
   http://www.downtempo.org/

Epiphany Corporation
   High-bandwidth mellow, ambient, trippy, groove and downtempo music stream.
   http://www.epiphanycorp.com/

Musical Starstreams
   On-air and online radio show playing ambient, dub, and downtempo music streams.
   http://www.starstreams.com/

Sleepbot Environmental Broadcast
   Peaceful streaming audio featuring a random cycling of some of the most sleep-worthy tracks ever created.
   http://www.sleepbot.com/ambience/broadcast/

SomaFM
   Ambient, downtempo and chill beats from well known and unknown artists.
   http://somafm.com/

Static Beats
   Ambient, IDM and electronica streaming broadcast.
   http://www.staticbeats.com/

The Mobius
   Web companion site to 'The Mobius,' an Atlanta based radio show that features ambient, dub, trip hop and IDM. With on-demand streams of past shows.
   http://www.themobius.net/

VoyagerRadio
   Station broadcasts downtempo, chillout, dub and drum 'n' bass.
   http://www.voyagerradio.com/

real:time
   Free online stream hosted by Shadow Records recording artist Saru featuring trip hop, downtempo, ambient dub, illbient and electronica.
   http://www.realtime365.com/