In the article mentioned in the previous post, I talk about adding EDA to SOA and how you can use Complex Event Processing (CEP) to process the event streams and infer the trends and enhance the understanding of what happen inside your business. All the tools I knew about were Java tools I knew about were Java tools but now I've found out (via Nauman Leghari's blog) that there's also a .NET CEP engine and it is even open source - It is called NESper and like many other tools it is a port of a Java tool.
I am not sure how good it is - but at least I'll have an interesting evening today :)