Been working on the app the last few weeks. I’ve been looking into Ant, JUnit, and CVS for the respective purposes.
I also purchased a Mac Mini this weekend, and one thing I wanted to look into doing was getting RPG Audio Mixer running on Mac OS X
There’s a few funky things, and some non-working bits (like not actually playing any audio), but for the most part it functions.
Things I’m currently working on getting implemented: drag & drop, audio file browser, multiple selection in the song and effect playlist.
I updated RPGAM to correctly handle Open, Close and Exit commands when you have an unsaved Adventure. It will now ask if you want to save the currently unsaved Adventure first. How nice of it 
I also made an abstraction to the “audio engine” of the program, in case I decide to not use JMF, or use a different audio engine for a different platform (like Mac), depending on the support for JMF on Mac and wether JMF is a dead project or not. It also helps me seperate out what the main application is responsible for and what the audio engine is responsible for, instead of mixing the two.
Get the latest version from the download page.