You plan to realise support jackd in linux?

I do at least plan to investigate the possibilities of integrating Jack, Rewire, and AudioUnits for Linux, Windows, and OS X respectively. Unless someone else feels like patching support in, I will probably start looking at that once (a) the player backend and Schism Tracker's interface are unified properly and sanely, and (b) the new input system is in place and customizable keybindings are working.
The former is fairly close to done now, although some things are completely screwed up at the moment and file I/O needs to be rewritten. As for (b), the event processor is checked in and test code is fully functional and capable, but it's not at all integrated with the program.

So, short answer: yes, at some point!

Thanks! It would be magnificent!