C Theory
http://www.ctheory.net
Rhizome
http://rhizome.org
E-flux
http://www.e-flux.com/journals
East of Borneo
http://www.eastofborneo.org
X-Tra
http://x-traonline.org
Altx
http://www.altx.com/home.html
Public Netbase
http://nonstop-future.org/discourse