Alexander Maryanovsky, the developer of Jin, a Java-based chess client, has filed a lawsuit in Israel that alleges multiple violations of the GNU General Public License (GPL). In the suit, Maryanovsky alleges that International Chess University (IChessU), a startup offering online chess tutoring, and Alexander Rabinovitch, its CEO, violated both his copyright and the GPL in its production and distribution of the IChessU client, a piece of software based on Jin. Both sides agree on the general outline of events, but differ in their interpretation of the GPL and its applicability.
http://enterprise.linux.com/enterprise/06/09/14/155222.shtml?tid=41