You can BROWSE Handshake Mercenary with HNS.to - but to signup / login / post - you need to use an HNS resolver - read our POST AND GUIDE HERE ON HOW TO DO THAT.
Once you have HNS resolver or Beacon Browser - please go here: http://handshake.mercenary and then you can signup and post and contribute. We welcome you and want more HNS usage and adoption.