South Sudan

On 9th July 2011 South Sudan becomes the world's newest country. See the new world map here

UPDATE
Only a month after the South became independent all is not going smoothly between the new neighbours. This BBC article reports on Northern Sudan blocking oil exports from the South after accusing them of failing to pay custom duties. As most of the oil is now in South Sudan, the government in the North was never going to be happy with the South gaining all the oil revenue. I think there will be more difficulties here.....