Mailing-list
There is a mailing list tntnet-general@lists.sourceforge.net. To subscribe use the subcription-page at sourceforge.net.
The mailing list is also accessable by web via gmane service at http://dir.gmane.org/gmane.comp.web.server.tntnet.
IRC
Discussion about Tntnet is done at freenode-channel #tntnet.
Developer:
Tommi Mäkitalo