The U.S. State Department
http://travel.state.gov/travel/cis_p...w/tw_5768.html posted this on 15 September and I didn't find a "we're now open" advisory, but on their Khartoum site
http://sudan.usembassy.gov/ it appears that they've re-opened for business, apparently including dependents at least 21 years old:
Emergency Message for U.S. Citizens – Departure of U.S. government personnel
The U.S. Embassy alerts U.S. citizens that on September 15, 2012, the Department of State ordered the departure of all dependents of U.S. direct hire personnel and all non-emergency U.S. government personnel from Sudan, following the attack on the U.S. Embassy in Khartoum. The airport in Khartoum is open and commercial service is available. The Embassy is closed for all Consular Services until further notice.
U.S. citizens are reminded to exercise caution at all times and closely monitor local events through reliable local and international news sources. Because even peaceful demonstrations can turn confrontational and become violent, U.S. citizens are advised to avoid all public demonstrations and political rallies as well as areas around them. You should keep a low profile, vary your travel times and routes, exercise care while driving, and avoid areas where large crowds are gathering.
U.S. citizens should not come to the U.S. Embassy for any reason. For U.S. citizen emergencies in Sudan, please call 0187-022000 (local). Press "0" or remain on the line.
Their warnings are generally for travel outside Khartoum, notwithstanding that small matter of the embassy being attacked.
Australia provides travel advice too:
http://www.smartraveller.gov.au/zw-c...w/Advice/Sudan. Succinctly: for Khartoum "reconsider your need to travel"; outside the city, "Do not travel".
Note that I'm not climbing on a soap-box telling anyone not to travel; I'm considering originating there myself, but will not spend more time on the ground than absolutely necessary and will surely be carrying my GlobalRescue card.
My post is just in case anyone doesn't realize that State does have a charter to protect citizens and publishes generally candid assessments of travel risks.