That's what I understand.

From Wikipedia (use with caution -- I have read the same information elsewhere):

Lieutenant General Seretse Khama Ian Khama (or Ian a Sêrêtsê; born 1953) is the Vice President of Botswana and the Paramount Chief of the Bamangwato tribe. He is the firstborn son of Sir Seretse Khama, the country's foremost independence leader who was President from 1966 to 1980, and Lady Ruth Williams Khama.

President Festus Mogae intends to resign in April 2008, at which point Khama will become the fourth president of the Republic of Botswana. The next general election is planned for October 2009.