Gtk-gnutella's sourcecode is nowadays hosted on github at https://github.com/gtk-gnutella. You can clone the git repository with the URL https://github.com/gtk-gnutella/gtk-gnutella.git.
A new build of gtk-gnutella should now be available under src/gtk-gnutella, which you can now launch with ./src/gtk-gnutella.
After a while there will be new changes pushed to the origin remote. To fetch these and build a new version while still in the gtk-gnutella source directory, enter:
Which will also cause a new build of gtk-gnutella to be available under src/gtk-gnutella.
We need people to test new features and it would be great if you'd test this devel branch and report any issues to us at the bug tracker or by mail at gtk-gnutella-devel@lists.sourceforge.net.
That's it, read our extended git guide if you want to know more on how you can make more use of git, for example if you encounter a bug and want to fix it yourself.
Currently we need help with testing the following features in the devel branch: