Well.. most of it is there..
now stuff missing is:

-Midi Configuration: (is this necesary? at least for editing the values)
-IT saver still seems to have a few bugs, and IT sample compression would
help too.
-Sample Sustain Loop (it's there, but not implemented)
-Fix S3M loader (it's quite screwed)

Not that important but..would be cool:

-Nicer mixers.. (mmx/cubic spline/etc)
-Midi in
-ALSA/ESD support
-ports to other OSs

Done but not yet integrated:

-Win32 sound driver (ardaxus)
-BSD port (scorn)
-Direcsound sound driver (yesso)