Redstone Science Fiction just opened for a two week submission window so get in quickly:
Redstone Science Fiction publishes quality stories from across the science fiction spectrum. We are interested in everything from post-cyberpunk to new space opera. We want to live forever. Get us off this rock.
We do not want supernatural horror, urban or heroic fantasy. No vampires, sparkly or otherwise.
They are looking for stories between 750 and 4000 words, and are paying 5 cents per word. That's a professional rate, so expect some solid competition to place your submission.
All information here: http://redstonesciencefiction.com/guidelines/