Well, I haven't re-read through the merge, but I'll just say that ALSA plus the OSS plug-in for ALSA have always worked very well for me. And this includes games running under Wine or Cedega or SDL and even Flash with the extrasound mod.
Pulseaudio, while I admire its goals of networked sound, has always caused more trouble than it's worth, and I typically won't install it or I'll uninstall it if I have to.
JACK, on the other hand, is a godsend. Sure, it's a bit more difficult to set up and you need a low-latency kernel to really appreciate it, but it is, by far, my favorite. Any application that is worth anything will have a direct sound output to JACK, also -- Mplayer, Amarok, etc.
So, that's just my $0.02 worth on Linux sound; and, apparently, Rgb has *finally* been given mod status. Kudos, my friend! Please don't delete my OT thread because I really do need to post music videos somewhere when I'm drunk. It is crucial to my sanity.