Heh, remember when Microsoft agreed to distribute those SuSE GNU Linux coupons? Well, those coupons have no expiration date, so if even one person uses one of those coupons to get SuSE GNU Linux distros after the GPL 3 goes into effect in July, BINGO, Microsoft is covered by the GPL 3, and its patent claims against any user of GNU Linux are dead.
Link to Novell tricks Microsoft into killing MS’s patent claims against Linux users