Today my collegue Robert Beeger told me that he is working on a plugin for the IntelliJ IDEA development environment to support the OSGi programming model. And the first initial release of Osmorc (that is the name of the plugin project) is already available for download. I haven't tried it myself (I am using Eclipse for bundle development) but it sounds quite promising from his announcement. The support seems to be somewhat limited for this very early release but it is great to see that support for OSGi is becoming reality for more IDEs than just Eclipse.
OSGi and IntelliJ IDEA