Some of the new features are:
- Coherence C++ API
- New Coherence Serialization Framework
- New and Improved Coherence Data Grid Functionality
- Management Framework Enhancements
- and many, many more...
To obtain the Oracle Coherence 3.4 Developer Pre-Release 1 product, logon to MetaLink and lookup Note 602553.1 and follow the directions.
For further details about the Oracle Coherence 3.4 Developer Pre-Release please refer to this OTN page.