I was just forwarded a link to this new blog. I took a quick look at it today and like what I saw. Very cool blog in the tradition of such flash-dedicated sites as Tastes of Darkness.
From the site:
Flashes of Speculation is dedicated to the sharing of works of flash fiction in the genre of speculative fiction. This includes science fiction, fantasy, and horror that contains an element of sci-fi or fantasy. Please refer to the Submissions page to submit a story.
Check it out.