IntelliJad 0.4 just got released. Note this is an IDEA 7-only plugin. Further updates to the IDEA 6-compatible version will be made within the 0.3.x version stream.
1. reindentation doesn't appear to work correctly on Linux; it's fine on Windows.
2. At least one NPE will be thrown from within IDEA when you decompile a file - this has been reported as a bug.