I was using brunch. Not sure why it's not included in the zip but I now have it on the gnex's "sdcard" so it's easy enough to copy into system/etc if I need it again.Glad to help. I'm having a blast learning a bit more about this stuff
Were you building it with brunch as described in the OP? I think that's the only thing I did differently this time and the audio_policy.conf worked correctly.
And to your earlier questions:
Since this tutorial was written with 12.04 in mind, I'd probably go on and upgrade to that and install the listed packages.