I never know what I'm going to find when I go searching for short story markets. Today I discovered the Short Story Symposium blog hosted by Alain Gomez. Ms. Gomez posts the work of short story writers that's available for sale. Very nice way to get word of your short stories out there.
From there I discovered the Short Fiction Writers Guild. It's free to join, the basic requirement being that you have two works published and available to purchase. There is also an expectation here of your being willing to help other short story writers if you join.