Well, I'm back up and running. A nice, new, quiet, powerful PSU (that may be a slight bit too big for my case's original screw holes) is sitting in my case, running my computer. Now to get back to business.
Where I last left off, I had done some SVN installs of FFADO and JACK to test, but I was getting no success. I started to hypothesize that they haven't developed firewire 800 support yet, as none of the units preceding this one had firewire 800 capabilities. Now I'm running off of that theory and hunting around for my old, 15' long firewire 400 cable. I will be checking my brother's place for it shortly, and, hopefully, I'll have it tracked down in no time.