Some of you may have long been familiar with Seven by Twenty. It was new to me. I'd encourage you to send work to the editor.
Published on Twitter (https://twitter.com/7x20), Seven by Twenty isa digital publication of "very very very short literature".
There are more than 3,000 subscribers. Factor in retweets, and you're looking at a better-than-decent circulation base.
The magazine's first (and, to date, only) anthology, 140 and Counting, has work by 119 authors and poets, including Alan Summers, John Stevenson, Charles Trumbull, Lucas Stensland, and Jim Kacian -- far from shabby company.
Joanne Merriam recently stepped down as editor. Julia Platt, the new editor, is very nice.
Submission details are on Merriam's website: http://www.joannemerriam.com/seven-by-twenty/.
The website gives fair warning that it may take one or two months to receive a response (a timespan short enough to be tempting). That said, I received a response six days after submitting work, and my work went live a day later.
In the world of publication, that constitutes immediate gratification.
First I heard of it. Thanks for the heads up.
7x20 is not a paying market, but they take - and encourage you to submit - previously published material. It's nice to see a market that accepts haiku (and scifaiku and other short form) reprints.