Over at the resources page, we'd added a bunch of new online places for more free listening:
Live Constructions Archive, WKRC 89.9 FM NY - Although no longer updated, plenty of great sets from eRikm, Francisco Lopez, Gen Ken Montgomery, Phil Niblock, Zbigniew Karkowski, Yasunao Tone, John Duncan, Steve Roden, Mountains and more.
Free Music Archive - Curated by WFMU, WEXP, Issue Project Room, Dub Lab, etc. Tons of stuff all over the map.
Abient Editions - Joda Clement's's very slowly growing archive of live improvised sets from Toronto.
Calculations - Jason Brogan's series for contemporary composition.
Wandelweiser Radio (direct link to audio stream - you may need to install the VLC player) - streaming web radio for this composer collective working largely with space and silence. Playlist is here.
Check it here.