Alright, I went and finished off my midi keyboard to a nice 1.0 version. It has a native for both Macs and Windows (different downloads), and has the ability to choose which MIDI out device you want to play through. Another thing that I've added is a chord function. Now when you hit Caps Lock it puts the keyboard into chord mode, which well... plays chords instead of notes. The bottom set of keys(Z through /) function as the chord selection buttons. Everything from a Major Triad to a Minor-seven-flat-five chord.
You can also change MIDI devices on the go. On default it trys to load the Java Synthesizer, because that it the most likely to work, but in case it doesn't, just hit the escape key and select which device you want (usually the GW Synth in windows, I think).
Anyway, it has a readme, and it works pretty dang well. Enjoy!Mac - MidiKeyboard.dmg.zip[71.23KB]PC - MidiKeyboard.zip[151.66KB]
Linux people who want a copy just PM me, and I'll send you a copy.