From Not In Our Name:

In the event that the worst happens, and the U.S. does launch its vicious "Shock and Awe" bombing of the people of Iraq, go immediately to www.notinourname.net for the latest information on resistance plans.

While you're there, note that their statement of conscience is almost unique in that it exposes and repudiates the whole political program behind this war, and we need more of that. The enemy is not this war. The war is only a tool of the enemy.