Why do not just someone start a forum for Amiga coding and try to get some peeps there?
Won't be much work at least to start one, fire up a unused x86 PC and install DSL or Puppy Linux and Apache, MySQL, PHP, phpMyAdmin, OpenSSL etc and you will have a fully working server, buy a cheep fitting domain for a few bucks, install phpBB and done.
I would set this up and host from one of my servers here at home if there where interest enough from anyone.