Thanks for your advice.  I started playing with the routing utility and it looks like I've established audio through the H8000FW and into Logic!

In the Routing Utility, I started off with the preset #14 Firewire AB.  I then took Analog in 1 and matched it to Main in 1 (thus replacing its original signal from Firewire in 1).  Firewire 2-8 are still going into Main in 2-8.  The remainder of the routing is the same as #14.

However, when I bypass the Eventide, I only hear back the dry signal out of my right speaker.  How do I get my left speaker to play back the dry signal as well?