2amtomorning
If you find yourself at the crossroads of insomnia and insanity, this is the place to channel those demons that keep you sleepless. Vivid pictures, poetry, ruminations, and confessions from the nether hours between dusk and dawn. Originally formed to celebrate the city at night, there's a strong urban theme.

green_future
Dedicated to promoting global sustainability, this community offers a forum for discussing current environmental news, research, and issues with tips on how to make positive, pro-active changes to reduce carbon impact. You'll also find information on how to get involved in eco-activism and learn about events near you (i.e., act local; think global). Offering a wealth of data on earth-friendly products and practices, you'll be inspired to don an organic bamboo cape and save the planet.

wtf_sexism
Self-described as "a little community with a lot of rage," you can soak up impassioned vibes and read blistering exposes detailing sexist attitudes in the news, pop culture, and science! A must-join community if you are, or love, a feminist. (NB: the topic of whether a "man" can be a feminist is outside the scope of this spotlight, but will probably wind up on the Writer's Block.)