Just by filling out your name and contact information, the "Save Darfur" organization will a send an email on your behalf to the president, your senators, and congressman urging them to sign the Darfur Peace and Acocuntability Act. The cost? It's free of charge. (The website also provides information about the act itself if you want to learn more.)
It's a very simple process and it will let your political leaders know that you care about what's going on in Sudan. Our political leaders need to know that their constituents are aware of and want to put a stop to the genocide!