Connect the FireWire drive to a Mac with file sharing set up on it, and then connect that drive's other FireWire port to any other Mac. Next enable networking over FireWire in the Networking System Preferences panel. In the setup panel, give the computers manual IP addresses -- I used 10.0.0.2 and 10.0.0.3, and a subnet mask of 255.255.255.0. Finally, simply connect to the Mac with the drive showing up in the Finder, and it will show up in sharing!
This allows you to network over FireWire and share a hard drive, which for me is useful for today's task of backing up all of my DVDs onto the drive. It could be useful for a multitude of tasks -- especially for older computers with FireWire and slower Ethernet.

