Publication of The Unwelcome Warlock is tentatively scheduled for September. Wildside is moving offices, though, and running into unexpected difficulties, so I would not be at all surprised to see it delayed until October or even November.
Still no word on cover art.
Incidentally, Chapter One will also be included as “The Warlock’s Refuge” in Tales of Ethshar, the eleven-story collection that Wildside has just accepted. (Contracts are reportedly in the works.)
No firm plans yet on future serials or further Ethshar stories.