UniChat will be a LAN chat/IM program designed for large scale networks (in particular universities). It will be written in C++ with the GTK+ toolkit for a GUI and the Gnet library for networking functions - aims to be portable to both linux and win32.
This project is underway but in far too early stages to release. Be patient. GNU General Public License will apply.
For anyone interested in such things, the precompiled Gnet win32 binaries for version 2.0 are available here. The license is LGPL and the source can be downloaded from http://www.gnetlibrary.org