Sounds like they're either going to port it to C# or add Java development to Visual Studio? Though I doubt the latter is the case... Given the history of Java and Microsoft...
What it sounds like is that they're going to start properly endorsing the modding community, something Mojang failed to realize is absolutely critical to minecraft.
Interesting, I never really gave it much thought. I always wanted a Java plugin for Visual Studio personally. Oh well. I guess IntelliJ is good enough. I guess it makes sense, if I remember correctly some of their download managers use Java themselves, or used to.