IBM is currently exploring the CEP space with their Active Correlation Technology (ACT) initiative.

IBM's CEP

ACT is IBM's answer to handling CEP (complex events processing) - a little bit different than traditional "event rules" because CEP is designed to handle high capacity events and situational modeling - not just "returning an answer". CEP has been around for a little while, but just not formally called "CEP" - basically anywhere where high numbers of events occur simultaneously and situational content is derived e.g. In today's fighter planes – the onboard CPU takes in simultaneous flight data, targets, physical data, strategic data, etc. and processes it all into suggestions and actions for manual and automatic compensations. The distinction can be made: business rules and event rules are designed to simulate the decisions of one simultaneous person (make a loan decision, determine eligibility, etc) - CEP is designed to simulate the decisions of many simultaneous people (all of these events just occurred - what situation does that present, what decision(s) should be made, etc?)

David Luckham has developed a site dedicated to CEP. I am interested to watch as the paths of EDM and CEP continue to move towards each other. To my knowledge there are no COTS packages associated with either CEP or EDM to date...