I am guessing you are already following all of these tumblrs but just in case:

http://azspot.net/
http://oceanofmind.tumblr.com/
http://commondense.tumblr.com/
http://oomk.tumblr.com/
http://crucifytheego.tumblr.com/
http://humantype2.tumblr.com/
http://mohandasgandhi.tumblr.com/ - Who is/was this originally? I wasn’t following them…
http://syntheticpubes.com/
http://metaconscious.tumblr.com/