Firewire 800 only but for a couple of bucks you can get a 800 to 400 adapter since it is backwards compatible. Still it sucks that it only has one Firewire port.
I can't even begin to imagine WTF is up with Apple and Firewire these days since they seem to be trying to kill it.
My new 3G iPhone will no longer work with Firewire at all, it wont even charge from a Firewire port so if I want it to charge while plugged into my expensive Alpine car stereo system I would need to get an
adapter.