Electronic Frontier Foundation filed a proposed class action earlier this year against AT&T for cooperating with the U.S. Government's domestic wiretapping program. The government intervened and tried to have the case dismissed.
In a 72-page ruling today, Chief U.S. District Judge Vaughn Walker found that "Dismissing this case at the outset would sacrifice liberty for no apparent enhancement of security." The rest of his order is here at the EFF site. EFF has also set up a number of pages about thsi suit, including an excellent primer FAQ.
The right is going to howl about how this is simply another block to prosecuting the fight against terrorism. It will be interesting to see where this case leads.