http://cementimental.tumblr.com/ - news/flyers/misc/noise machines/art
http://transientconstellations.tumblr.com/ - London noise/experimental/other events and projects
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Philadelphia
http://stormbloopermusic.tumblr.com/
I post about music, my gameboys, and lots of pugs and other dogs/animals.
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Matthew Joseph Payne
kineticturtle.tumblr.com
I post carefully.
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Abandoned on Fire
Weird, closing in on two years since I started that... doesn't seem like it at all. 
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Boston, MA
http://blog.chrisantonellis.com / http://chrisantonellis.tumblr.com uhh pixel art web design and other lame shit
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Geneseo, IL
http://sapr8bit.tumblr.com/
Songs I've made and updates on them with a lot of reblogged funny or interesting things.
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Austin, TX
http://spacestationstella.tumblr.com/
warning: not music related normally, mostly queer stuff.
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hiding under your bed
I recently deleted my account and started over, so there's not much on there yet, but here's my mostly OC music/art/chip-related blog
http://josh-shmosh-secret.tumblr.com
I JUST made an introductory post and I'm about to post some pictures of a project I'm currently working on up there.
annnnnnnnnd here's my personal one.
http://mostdefinitelynotajorsh.tumblr.com
I think the background image is Thretris'. Not sure.