Nope this posting wasn't late at all, nothing to see here! Twelfth Planet Press are putting together an interesting collection for publication in August:
The great James Tiptree Jr was born sometime in 1967, a little over forty-eight years ago. Fifty-two years earlier Tiptree’s alter-ego, the talented, resourceful and fascinating Alice B. Sheldon was born. And somewhere in there, about forty years ago, poet Racoona Sheldon showed up. In celebration of the 100th Anniversary of Sheldon’s birth, and in recognition of the enormous influence of both Tiptree and Sheldon on the field, Twelfth Planet Press is publishing a selection of letters written by science fiction and fantasy’s writers, editors, critics and fans to celebrate her, to recognise her work, and maybe in some cases to finish conversations set aside nearly thirty years ago. LETTERS TO TIPTREE will be a collection of letters written to Alice Sheldon, James Tiptree or Racoon Sheldon; a set of thoughtful pieces on the ways her contribution to the genre has affected (or not) its current writers, readers, editors and critics.
They're paying 5c a word for essays and letters from 1,000 to 2,000 words. They're also looking for shorter responses (check out the guidelines and listing below).
For the guidelines go here: http://www.twelfthplanetpress.com/submissions
Literarium listing here: https://literarium.net/market/twelfth-planet-press/letters-to-tiptree