The Administrator of SDF (http://Freeshell.org) - Stephen Jones was started the Tetrinet server by our recommendation.
The server is fast and stable, and the version is 1.13.16+qirc-1.40b and the server supports spectating (TSpec). Freeshell users can access it via the command line, using a TTY with at least 50 lines. Shell command is 'tetrinet $LOGNAME tetrinet.sdf.org'
Server stats page - HERE
TetriNET Server host - tetrinet.sdf.org