I recently posted about the System Center Orchestrator CEP program here. Well, it is has now moved to being a public beta so you can download it and start getting your hands dirty. As with all Beta programs, I encourage you to give feedback to the product team so they can improve the product before final release. You will be able to find that contact information in the README file that is a part of the product download.
Download System Center Orchestrator Beta Here
You can also get deeper technical information on Orchestrator at the TechNet System Center TechCenter.