My company (Funtrench Limited) is starting out a bitcoin microfinance in Nairobi, Kenya. Pretty hard to get Bitcoins with local currency and trading on Mt.Gox or the rest of them involves a very circuitous route where almost everywhere no one accepts bank accounts from Africa. We're investing in Bitcoin because with the great success of mobile money in Kenya, and the new tax rules that have raised the transaction fees for M-Pesa, Bitcoin provides the logical next step in rapid, low-cost money transfer. With a network of SMEs as agents, we can provide an easy interface between local currency in East Africa and Bitcoin.

We've done a Kickstarter-like proposal https://www.bitbond.net/buyer/listings (our ID is S3AN134R8) while we work on the software and mobile apps. I think Bitcoin can be bigger in urban Africa than it is in Europe or Asia.