I have an M-Audio Firewire interface. It's bus powered and doesn't have a power switch. When I turn my computer off, it stays on. It is always on, unless I unplug the firewire cable. I know it's not a big deal, but it bugs the hell out of me knowing this thing is on all of the time. I know it does this with other bus powered firewire interface too. I us Mac OS 10.3.9, maybe theres something I could do in the computer's settings?