The Hub's forum (non-profit) outreach for Harm reduction experts and organizations, spread around for the benefit of the community:
http://www.deepdotweb.com/2014/01/26/help-harm-reduction-drug-awareness-the-hubs-outreach/
Link to original thread:
http://thehubaoydxrommh.onion/index.php?topic=245.0;topicseen
Even though it says an email address is required, and it checks the syntax of the email address, you can just enter anything like blah@fun.com and it will work. They don't verify the email by sending a link to the email address. This is good. I don't see why they would need an email address for such an online forum anyways.