Finally, the first EAP release is available. This post only shows the most prominent new features, as always the full details are available on the changelog.
OGNL
Big news: IDEA 11 will get full OGNL language support. Not only will this bring extended highlighting of your expressions, but also "intelligent" editing/navigation support - just like in EL-expressions. Please see the full details of current support at the dedicated page.
Action class properties
Action class properties will be resolved and completed in many more places - JSP tags,
validation.xml, ... 
Ofcourse, Rename refactoring and Find Usages is fully supported:
Actions
You can now use "Go To | Related File" to quickly navigate from your Action-class to any result file(s) as well as
ActionClass-validation.xml files can now be reached with this shortcut.
I18N support
Support for Properties-based I18N has been extended to
validation.xml. And IDEA 11 now supports Properties in XML-format as well.
