So I've got a gallon of wild yeast cider bubbling away happily. Here is my documentation of my experience so far:
I decided to use Hightest's SNA schedule to help fermentation along. I didn't add any at innoculation, but during active fermentation I added the stage 2 nutrients and wow! Immediately I had a reaction and thought it was going to fizz out the top of the carboy. Just a few minutes ago I added the last dose of nutrients and had the same reaction, lots of fizzing and bubbling. It was such a strong reaction that some of the trub at the bottom of the carboy was kicked up into suspension and swirling around.
I've never used the SNA schedule on any of my batches with ale yeast, but the wild yeast sure love it!