Close the barn door -- the horse has run away!
It seems I squawked too late. Judging from the listing at the USCJ Book Service, the Tisha B'Av Siddur of the Rabbinical Assembly (which I wrote below was in proofs) is now a fresh-faced seyfer making its way in the world.
Does anyone want to let me know if my favorite poem figures among the contents? I know I should buy it myself, but I don't have the money to spend this week.