FlashFictionMagazine.com welcomes submissions of quality flash fiction stories, ranging from 300 to 1000 words. FFM happily publishes a variety of sub-genres (literary, sci-fi, speculative, etc) and generally prefers grounded stories that unfold before the readers eyes with strong sensory description. While FFM currently does not offer monetary compensation, authors retain all rights to their work.
Go here to submit your work. FFM offers an accelerated submission response time, usually within a week, and tends to publish accepted stories two months out.