You have to give Oracle credit for persistence. The software giant has been trying to build out its groupware business for nearly 10 years, and has as yet modest success. Now, with Beehive, the next generation of its collaboration suite, Oracle may be sniffing some fresh and meaningful blood in the enterprise messaging waters. The investment Oracle is making in Beehive signals an opportunity born more by the shifting sands beneath Microsoft Exchange and Outlook, than in any new-found performance breakthroughs from Oracle’s developers.