Konga (a Nigerian company) is trying to upset Joomla (a South African company) to become the Amazon of Africa, and co-working spaces are starting to sprout all over the place.
There are over a hundred different mobile payment solutions, not just in the micro-payment sector, but for traditional middle class spending.
There's also been a recent boost for Nigeria to get back into agriculture (~80% - 90% of produce is imported. Welcome to the Resource Curse), there are some entrepreneurs trying to approach this field with the advantages tech can bring to the African agriculture landscape.