marchingjaybird

Well, there's the perennial favorite - Scans Daily: http://scans-daily.dreamwidth.org/
A general catch-all icon community (random, but relatively active) is - Icons: http://icons.dreamwidth.org/
For community pimping, there's DW Community: http://dw-community-promo.dreamwidth.org/
Individual artist/writing/misc pimping is Promoting: http://promoting.dreamwidth.org/
A writer I've started following that comments on POC representation in comics and superhero movies (and other similar topics) is Chromatic Heroes: http://chromaticheroes.dreamwidth.org/

There's also feeds for things like:
xkcd: http://xkcd-feed.dreamwidth.org/
Project Rooftop: http://project-rooftop-feed.dreamwidth.org/

It's sometimes a little harder to find things on DW than it was on LJ, but the numbers are growing.