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.

This is one of the oldest & most popular forums: http://www.backyardaquaponics.com/

Here's my build (still in progress, need to update the thread) to get an idea of what a small scale first time attempt can look like: http://www.backyardaquaponics.com/forum/viewtopic.php?f=18&t...

Reddit has a semi-active aquaponics community too, it's worth checking out: http://www.reddit.com/r/aquaponics/

It's been a wanna-hobby of mine for about a year now. Been too busy so far this year though.

Get in touch. My blog (way out of date, the system is now growing veggies and has some fish, planning on stocking it heavy with tilapia this week): http://praxeology.co.uk/blog/libreponics/