After the maintenance of this morning, Gamigo has released the PTS for everyone. Before that, it was reserved for the players who have pre-ordered Archeage Unchained. If you want to access to the PTS, simply choose the Public Test from the glyph launcher.
With that incoming players, Gamigo has released a new server for the PTS (PTS3) to avoid the long queues and/or the message "Server is busy" as the past week. That seems to works because at 1 PM, only the PTS2 as a small queue on the login.