This new market will make you crime writers happy, except for the non-paying market part, of course. The Hard-Boiled Dimension is looking for both speculative fiction and gritty crime stories. You can combine the elements but it's not necessary. The word limit is 2500 and as I said before, it's a non-paying market. You can find the guidelines here.
UPDATE: June 6, 2013 This site has disappeared into the ether, folks. No word why.