Well, now that the end of the Petriculture Cycle is in sight, I've got to figure out how I'll be filling up my spare time once the final chapter is written (and no, I'm not going on to Chapter Zero, or Chapter -1, or Chapter Horseradish, or anything so silly; it's just Chapter 1, and then a Prologue). Assuming the interest is still there (and I genuinely hope there is), I'll probably write up a few guidelines for anyone who wants to expand on the AU and post them in a thread in the Petriculture Cycle group. Of course, I'm not sure what sort of guidelines are needed for a situation like this, but I can cross that bridge when I get to it.
Obviously, Flash Fog is going to be there, but I'm approximately two-thirds of the way through that story, and without 2-3 week breaks between writing sessions, I suspect that it will speed up considerably. After that? Well, I have one or two ideas, though they might have to be modified a bit from their original form (a lot of world-building has taken place in-show since I last completed a non-Petriculture Cycle story).
However, the biggest thing is something that's been on my mind ever since the success of Petriculture demonstrated that there is, in fact, an audience for the kind of storytelling that I like to write, and it's one that's grown stronger as I've come to realize that that first story wasn't a fluke: namely, writing original fiction, and possibly getting some money out of it. I have several ideas that have been bouncing around in my head for years (more than a decade in at least one case). In some sense, this is the most intimidating prospect of all, not just because I'd be leaving the comfort of previously-established worlds and characters behind, but because I rather enjoy getting lots of feedback from my readers, and with a novel, you have to deliver everything in one big lump.* The inherent uncertainty about whether people will be willing to pay for something they've been able to get for free doesn't help, either.
In any case, I promised myself that I'd finish Flash Fog before I make another commitment to any project longer than a one-shot fanfic, so I suppose I can set that aside for the moment.
* Yes, I'm aware of Amazon's Kindle Serials, but I have reservations about that concept for completely different reasons.