A ceasefire has been signed in Sudan. But aid workers
warn that we're not out of the woods yet. Ceasefires in Sudan have come and gone before, and racist
janjaweed militias often ignore them from the outset. Not to mention the humanitarian crisis on the ground.
An external military force is needed to keep the peace. It probably won't be American, since the US is already overstretched by Iraq and Afghanistan. (Omar al-Bashir's regime in Khartoum is unquestionably more brutal than even Saddam Hussein's, but...oh, never mind.)
Probably best is a UN mission. Even if the US does not contribute troops, US diplomacy can go further than almost any other to make this happen. NATO air support might be needed later, again inconceivable without US initiative.
So do what you can. Call, fax, or email your congressman, senator, and the White House. The Sudanese government is Islamist, and therefore on the list of Republican bad guys, so this need not be a partisan issue.
And as I've said before, donations to the World Food Programme or Doctors Without Borders can make a difference.