I absolutely love MadTracker 2, and am excited to see it becoming open-source and cross-platform! As it is right now, MadTracker 3 is not a viable replacement for 2, but I am excited for it to come out in its first stable release. The nice part I am seeing about it, despite MadTracker 2 being programmed in Delphi, MadTracker 3, being in C++, will work with the awesome .MT2 file format! Currently, it is in a VERY pre-alpha stage. In fact, I'm having problems compiling for Linux! If you wish to help develop, test, or debug, feel free to send me and Yannick a PM. I'm the Linux dev, and he's the Windows dev.