Just emailed Jermaine Jones, who is the IIE officer in charge of Sub-Saharan Africa. His response:
"Notifications letters for all of the finalists to sub-Saharan African countries will be printed and placed in the mail (from IIE's New York City office) later this week. I'd assume that you'd receive your letter no later than the end of next week."
i applied to namibia for a full research grant. have not heard back yet, but heard from an 08-09 fulbrighter there that he heard back the second weekend in april.