Working fine on my A1200 with WB 3.1, using HippoPlayer, great way of utilizing ARexx.
BTW: Might be worth mentioning that you need to start the RexxMast tool in Workbench, but most users probably figure that out themselves.
EDIT:
Looking forward to "automatic download of next song when current finishes" (instead of repeat), and the "save song" function failed for me, so just copied the current module file from t: in another shell window.