Although we have a few people here who are into aquaponics, I doubt that right now there's enough of us to have an entire forum dedicated exclusively to the subject.
We have a catch-all "All Things Gardening" forum here:
http://garden.org/forums/view/...
and I'd love it if you'd post a thread about your aquaponics setup so we can learn from what you've done. From your description that you gave me yesterday (I met Pete at a local conference yesterday) I've really been wanting to see pictures of your setup!