http://blogs.technet.com/office_sustained_engineering/archive/2009/04/16/service-pack-2-for-the-2007-microsoft-office-system-due-to-ship-april-28th.aspx
Accourding to the blog these are some of the changes that are comming out for:
MS Project:
- The scheduling engine, Active Cache, and Gantt charts all have improvements.
- There is additional reliability with earlier versions of the .mpp format.
- Better memory management in the queue service.
- Performance to certain database table indexes is improved.
- Resource plans, build team, cost resources, and the server scheduling engine have improved.