From the update:
In the Dark Continent, the "Darkest Africa" supplement for S&R, is now available.
It features 7 lists: Masai or Ngoni, African Warlords, Azande, Zanzibaris, Jungle Cannibal Tribes, Pygmies and the European Explorers and Slave Traders.
The supplement can be downloaded for free from http://smooth-and-rifled.blogspot.com where you can find other free supplements.
Smooth&Rifles is a skirmish game published by Dadi&Piombo and covers "the age of musket". It is available in PDF format at 9 euros.