Amazon found it and is releasing it as part of its new Kindle Serials program.

With the cooperation of the Kurt Vonnegut estate, Amazon Publishing is releasing a collection of previously unpublished works by Vonnegut: six unpublished short stories (plus an additional unfinished science-fiction story) and one unpublished non-fiction essay, releasing today as a Kindle Serial for $2.99 under the title Sucker’s Portfolio.