The version 2.5 of IntelliJ IDEA Python plugin is compatible with IntelliJ IDEA 9.0.2. You can download EAP builds of IntelliJ IDEA 9.0.2 at the EAP page.
All new language features of Python 3.0 and 3.1 are now recognized by the parser. The semantics for some of the features (like the 'nonlocal' statement) is not yet fully implemented - full support will be included in future updates.
Debugging of Python applications and unit tests is now supported. All the usual debugger features - breakpoints, stepping, frames view, watches, evaluating expressions - are implemented.
Supported features include: