So the ones I know about are:
* Chicago (chifg.com)
* DC (dcfixed.com)
* Los Angeles (lafixed.com)
* San Francisco Fixed (sffixed.com)

* Australia (fixed.org.au)

But what others exist?

I'm trying to build a simple jump page to help people find the forum for them, it's just going to consist of a single page at http://www.fixedgearforums.com/ and just be a list of links to where the community hang out across the web, so that when people search Google and find this page, they get right to place they want rather than spend ages stuck in a crap forum waiting for someone to kindly whisper a good URL into their ear.

If you know of any I've missed (and I will have missed loads, I only did a simple search), then please PM me and let me know.