He can't call it genocide or ethnic cleansing yet. And don't hold your breath waiting for him to call it a [1] jihad. From [2] AP, with thanks to DC Watson:

UNITED NATIONS — Secretary-General Kofi Annan raised the possibility Thursday of international intervention to protect more than 1 million people threatened by fighting in the Darfur region of western Sudan. ...

Annan said he wasn't ready to describe the situation in Darfur "as genocide or ethnic cleansing yet" but he did call it "a tragic humanitarian situation."