There is an invite code for Free Madeira/Bitcoin Atlantis federation.

fed11qgqrztmhwden5te0v3jkcarp9ekkz6twdejhgtfjx5kk6ctyv45hycfwv3jhvtnxv4jxjcn5vvhxxmmd9upqzgqjppuuzgeh39ne5nkek3a624lcmg752aa5uzelv8a94lf3x7uzfgyzt6t5