I can confirm this info from the horse's mouth as well-- Butcher mentioned both of those at the signing I went to last night. (Actually, I think it might even be a novella rather than a short story. *crosses fingers*)

He also mentioned that he had wanted to name the book "Dead", but his editors had vetoed it, lol.

I am dyiiiiiiiing for the next book, holy crap. (<-- just finished Changes ten minutes ago)