There was some discussion about Khartoum a year or so ago, when the route first became available, and I remember only that it wasn't viable in the end; the search function should find that past discussion. One of the risks with including KRT on a OWE is that if the US imposes trade restrictions in the future upon Sudan, due to the situation in Darfour, the OWE ticket becomes invalid for travel upon AA (due to US law). So you could wind up including KRT and excluding AA, making it a rather expensive mileage run.