Here are some of the new features made available in the new service pack
Exchange 2010 Service Pack 2 Download
Some other Useful Downloads…..
Exchange 2010 Service Pack 2 Unified Message Language Packs
These downloads contain pre-recorded prompts, grammar files, text to speech data, Automatic Speech Recognition (ASR) files, and Voice Mail Preview capabilities for a specific language that is supported by Exchange 2010 SP2 Unified Messaging (UM). Warning: This UM language pack must only be installed as an add-in to Exchange Server 2010 SP2 Unified Messaging.
Exchange Server 2010 Service Pack 2 Web Service SDK
This release of the Exchange 2010 Service Pack 2 (SP2) Web Services Software Development Kit (SDK) provides new and updated documentation and samples for building applications that use Web services in Exchange 2010 SP2. Use this SDK to help you develop collaborative Web services–based enterprise applications.