Integration remains a high priority for enterprises in 2011 to 2012, leading Forrester to mine client inquiries and interview industry experts for insight into the latest integration trends. Enterprises are seeking a lean, mean, and more holistic approach to integration, doing more real-time integration and planning increased usage of enterprise service buses (ESBs) and data services platforms. The need to integrate on-premises apps with software-as-a-service (SaaS) apps is also starting to affect requirements. These trends will affect a wide range of Forrester clients this year and should shape key objectives for planned upgrades or modifications to integration infrastructure and skills. Application development and delivery professionals and enterprise architects should keep these trends in mind when planning application and integration strategy for the coming year.