Some Ugandan Art, which I got from a couple of artists at the Kasubi Tombs.
Fr. Martin Ritsi, "A Mission Without a Missionary": a paper by the director of the Orthodox Church Mission Center on the origins of the Orthodox Church in Uganda.
"Uganda Facts", compiled from the CIA Worldbook and other sources.
"Uganda History", compiled from the Library of Congress Country Studies series
Here you can find a reasonably detailed Map of Uganda. Also, a couple more maps, including one of Uganda's ethnic divisions, on my Uganda History page.