There is a lot of useful discussion on the user group about data messages and eventing, I thought that I would introduce mps, an eventing framework for kafka. It is written in Erlang and available on githubof at github.com/milindparikh/mps.
The README on github explains the philosophy with which it wants to grow up and I have written a couple of blogs on it to show how it works at the high superficial level. milindparikh.blogspot.com. Next posts (on technical stuff) are coming as soon as I can find the time. Thanks Milind