I was, for awhile, interested in MilkyTracker-
but got sidetracked with MIDI-based composition tools.
I'm poking at Denemo - http://denemo.sourceforge.net
(screenshot from a desktop X11 setup)
It's pretty close to useable out of the box, at least for Cxx0 Zaurii running X;
I'm looking into trying to trim/clean it up a bit more, make a good keymap,
and find a way to filter through Timidity without a 10-15 second delay.
The developers clearly have a unix-like brain:
the display is GUI/WYSIWYG, but notes are entered with vi / EMACS keystrokes.
Note: its basically a Score editor, using LilyPond natively, but can read/write
ABC and MIDI. Sound output is through Timidity - okay quality, but pretty slow.
Csound is also supported; if that might be less CPU hungry than Timidity
(I haven't tried it).
Anyway, a proper package for OE/OZ and ipk for pdaXrom
are definitely in the works.
I can post a tarball for Cxk pdaXrom if anyone wants to see;
but it builds clean enough from source, (or CVS) you almost wouldn't need one.