These are pretty nice, inkBot. I listened to a few of them and think they are solid chippy goodness.
My personal favorite being penultimate.
As well, thanks for the link, Krush, as I'm always out to look for new programs to tinker with. My experience with trackers is limited to TFM Maker and FamiTracker a little bit (my main machine is FL Studio, with a little Reaper dabbling), so I am not unfamiliar with tracking.
That being said, the interface to this thing looks pretty darn intimidating!