...which would be much more expensive than daisy-chaining the needed drives.Or get a hub. FireWire 800 could run 2 FW400 devices at full speed.
Sorry, it's a bit off-topic, but what are Firewire hubs good for anyway? I know there are some devices which have only port and thus can only be at the end of a chain. So there might a (very) few applications for a hub if you need to connect more than one of these at once. But otherwise... what are FW hubs made for?