http://www.stopthehunger.com/
http://www.greenpeace.org/international/en/campaigns/agriculture/problem/genetic-engineering/feeding-the-world-facts-vers/
The first link has sources listed at the bottom. The second link is to a Greenpeace article that corroborates much of what I have read from Latin American sources which is where I mainly get my news so this is something to read in English that should make some sense.
India has many starving people but is paradoxically a net exporter of food. This has to do with market factors that could easily be adjusted through shifting market strategies in the US, but it would not be profitable for US corporations to do so.
Africa is a tougher nut to crack. However, the thing about having a list of problems affecting an much greater number of folks, is that when problems are given solutions, the number of people solving them grows. Believe me when I tell you I have researched this in depth. The cost to feed the world is a drop in the bucket compared to what is wasted.
A lot of solutions also do not seem to be directly connected to food or to logistics but to other markets entirely. For example, rare earths. This is a big one, because it seems the continent with the most hungry people happens to be the richest in terms of wealth per person. One would think that means that there are jobs in Africa for miners. The fact is, these jobs are being worked by slaves (there I go again, right?). They are compelled, by market forces to work for next to nothing and in many cases are indeed forced to work by all manner of threat. In fact, the only option existing in most cases, for the sale of these resources is an exploitative black market which profits greatly at the cost of people who likely have no idea how they make it possible for any of us to afford devices like Iphones. Even many of the corporations included in the chain of production are not privy to the facts and simply seek materials at the cheapest cost. This has a rippling effect on workers in first world economies too, such as Gina Rinehart's employees who are taking pay cuts. They have to compete and even with more efficient techniques and modern infrastructure it is cheaper to get resources out of Africa, even in Australia, in her own market.
What I'm getting at, is that instead of reaping huge benefits at home, that we somehow foster unionization of labor in Africa. That is asking a lot huh? Blood diamonds are cheaper. It isn't just diamonds though, it is almost all rare earths. Who is willing to pay more for freedom diamonds? What corporation will float if they boycott such resources? The issue of diamonds has been given plenty of attention but Africa has the same sorts of issues pertaining to all of it's resources, while many people starve. It may not seem like there is much we can do here, but most of the demand for those resources is in the first world. In a lot of ways, it resembles the way the drug war has made Latin America so violent.