There is a basic experimental Eclipse plugin. The plugin is hosted directly in the JetBrains plugin repository. It may not work properly on other operating systems. Note: This plugin has only been tested on Mac OS X and Windows 7. If their licensing policies alienate those customers, it won't be long before new alternatives emerge or people become motivated to improve existing ones.
However, it also has a lot of competition that is free and their core user base is developers. IntelliJ is still, in my opinion, the best Java IDE out there.
