Another “you probably don’t need it, but it’s nice to know somebody makes one,” product, the Prosilica FB1394B Fiber Optic Bridge lets you effectively extend the distance of FireWire devices from the standard 4.5 meters to up to 500 meters. It’s pretty simple, really—two powered boxes on either end have FireWire ports and play translator. Prosilica also sells cameras that connect directly by fiber-optic, so if you wanted to use the bridge to interface to those via FireWire, that’s an option, as well.
Fiber Optic Bridge extends firewire to 500 m [ThomasNet]
