Found two new (to me) interesting looking markets for flash fiction.

THUMBNAIL MAGAZINE
http://thumbnailblog.posterous.com/pages/guidelines-2
The deadline for submissions for the fall issue is October 1, 2010.
Quarterly literary magazine accepting original, unpublished photographs and images of artwork in JPEG format, 300 DPI; prose (essays, fiction, review, commentary), unpublished, 800 words or less; poetry, unpublished, 40 lines or less. Will be publishing 10 poems and 10 works of prose (5 fiction, 5 non-fiction) in each issue, and will include one or two submitted artworks in each. Acceptance is somewhat competitive. Show us your best work. Pays contributor copy.

CONCISELY
http://www.conciselymagazine.com/
Quarterly print magazine interested in publishing stories under 500 words. All contributors get two complimentary copies of the magazine.

And here's a third for good measure (which is a high paying market).

SUBTROPICS
http://www.english.ufl.edu/subtropics/submit.htmlwill consider works of fiction of any length, from short shorts to novellas (up to 15,000 words) and self-contained novel excerpts. Pays $500 for short-short fiction. Submissions are accepted from August 31 to April 15

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