Thanks to Pam for commenting at the bottom of the Nigerian languages post this evening. Its a wonderful surprise to hear that Nsibidi ceramics date back to the 5th century in the Cross River area. See here and here. (Frustratingly, you have to pay US$12 just to have 24 hours access to the article - don't you detest 19th century modes of academic intellectual ownership!)
Inside Iran's 'Silicon Valley'
22 hours ago