Friends of Guinea is an organization of former Peace Corps volunteers serving in Guinea, West Africa. The Guinean Languages section of the FOG website has hard-to-find material on Susu, Pulaar (Fula) and Malinke languages, as well as Wolof from Senegal. Pulaar especially would be of interest to conlangers due to its amazing complexity including an honorific vocabulary entirely different from the standard vocabulary.

There is a link to a site for a sort of Pan-Mande language called N'Ko that uses common features of the related languages of Bambara, Malinke, Mande, Mandingo and others to create a lingua franca. Follow the link for some cool N'Ko alphabet info with font download.