Wow. Thesee are stunning news. IBM to acquire ILOG must be one of the cleverest move IBM has made in the past five years. It will definitely enforce its position as world's top business solution provider.
Open source solutions are still very poor at this point in time. COIN-OR, being the best, has still a lot of ground to cover to even become a serious option.
Alan king, from IBM, has commented on COIN-OR mailing list saying that "No-one from IBM responded to this" and "The message from our management is that IBM Research is committed to open source, and COIN-OR in particular". His view is optimistic in the sense that the impact could "could go both ways: adding ILOG to IBM creates more potential distractions for IBMers who contribute to COIN, on the other hand, incorporating ILOGers into IBM means that the pool of potential contributors to COIN will go up!".
I guess we will be hearing a lot more about operation research and optimization in the tech news throughout the next few months.