According to the Associated Press:
The complaint was filed with the Paris prosecutor's office as Rumsfeld arrived in France for a visit, according to the New York-based Center for Constitutional Rights, the Berlin-based European Center for Constitutional and Human Rights and two Paris-based groups, the International Federation of Human Rights and the League of Human Rights.French prosecutors will now determine if the charges have any merit, and if Rumsfeld is still protected by any sort of diplomatic immunity, before actually hauling him in.
The rights groups say their complaint could go forward because people suspected of torture can be prosecuted in France if they are on French soil.
So, if you happen to be at a French airport over the next few days, and you see Rumsfeld trying to sneak out, do what you can to stall him.
Read more about Rumsfeld's charges.