I bought a Belkin USB 2.0/FW combo drive at Office Max for 25 bucks and a nice 12ft FW cable at Target for 15 bucks and I havent had ANY problems since
Just plug in the FW cable to the PC/Mac, plug the other end into the 722, turn on 722, BAM, connected. Before you remove the FW cable from the 722, I right-click and hit 'eject' on my 722 icon under XP Home and it disconnects. Altho, I forgot to do this recently and just unplugged it cold from the 722, and the newer 722 firmware took it with stride and didnt freexe up like older firmwares
so I guess nowadays with firmware 2.15, it doesnt matter, you can just xfer teh files and unplug the FW cable from the 722 without 'disconnecting' or 'ejecting' the drive under windows like you previously had to do
have fun and good luck, because once you own a 7xx, you will NEVER look back