Nick: basically if you look at it this way, the G5's have a fw800 bus on them, which is backwards compatible with fw400. It will run fw800, but if you plug something in to it which is 400, it will revert to the old spec, for backwards compatibility. So it is still worthwhile as an 800, but you just can't run different spec devices on the same bus. You have to install other buses to do that. Even then, if you only had fw800, and it says you can run a million or whatever number of devices off that bus - it's not true, in my experience, don't run more than 2 drives on any one bus (no matter how many ports it has), don't mix and match your specs, which anyway is bad because you lose the speed of any 800 devices there, and don't mix and match your devices *on any one bus*, you CAN have audio devices, hard drives, cameras - whatever as long as each type of device is on a separate bus, and even then, don't mix cameras on the same bus - just one per bus is enough. That's my experience anyway since dealing with fw for many years on macs.
Miklos.
