There are lots of smaller communities springing up but Aquaponics is a relatively new technology. There is not a central, well-established community for AP growing. However, here are a few links to some projects:

http://www.growingpower.org/ They have reported some insane yields off very small plots using AP technology. Also, as they grow in the midwest - the climate and conditions should be relevant.

http://practicalaquaponics.com/blog/ Murray has been a go to for my research as he has been using AP in Australia for years and has a solid, proven modular system.

I do my research on various forums, but have learned the most through my own experimentation. Feel free to hit me up with any questions.