Thanks for this Mike, I'm getting audio output now on the I9100G! Only thing is that the pause and speaker/headphone switches are extremely wonky (Sometimes they work, other times not, and sometimes music would come out of both speakers and headphones). Sent you a log, hope it helps.
EDIT: Also, there's no sound without attached earphones to act as antennas, but that's not really an issue.
EDIT 2: Volume adjustments don't seem to have an effect.
Try Oct 27a: http://d-h.st/JJ6
Volume control might work better if you enable/check Debug-> Silent Loop and restart Spirit. Or uncheck it and set Debug-> Play Audiotrack to "Enable" and restart Spirit again.
EDIT: Oh, yeah, do we Blame Samsung ?