If you chose to implement any of the server functionality within another product then the Gnuws Team should be given the credit they deserve. The development platform that forms the backend of the server is, however, less restrictive. This means closed source plugins can be sold provided that they acknowledge the Gnuws Team. All the plugins with the Gnuws server source tree are open and covered by also LGPL and therefore can be used to develop similar plugins. However, since this is a free project we would appreciate some recognition for the work put in.
Free software works when people are fair.
The latest source code snapshot can be downloaded from here. The code is VERY alpha right now and so the compilation process is less that clean. Fair comment, but this code is pre-alpha. It is an aim of the project to keep it easy to port. It does very little, as mentioned above.