We have learned about this in school and it is NONSENSE that Sony's Playstation 2 ALONE has incited the African War.
Coltan is used in a wide variety of products and electronics. To name three of them: Laptops, GSM's, PC's, but there are many more.
Cell phones have grown very popular the last decades and the production of these is enormous. In our class nearly everyone, (27 of 28 pupils) had a cell-phone. The same story for laptops and pc. Everyone who is looking at this post, topic has a computer or a laptop that is very lickly to have coltan in it.
IMO we don't need to blaim Playstation alone, but the entire industrialised world