yeah, gnut doesn't even support gnutella/0.6 connections... If you must use a command-line client, use mutella.sf.net but this client doesn't have the best reputation and it is not very uptodate either.

gtk-gnutella.sf.net is probably really the best choice if you are looking for something that requires less than 80MBs RAM of you. - Myself, I'm using LimeWire (cvs -d :pserver:[email protected]/cvs co limewire)