Right, calling this a challenge as I'm not normally one asking for IT help on here (and we all know this is the best place for it ). Also I've had a proper go at this and failed:
Anyone know of a laptop with a built in powered 1394b (firewire 800) port other than a mac?
Expresscard's don't count - they need external power supplies too for devices that take bus power.
As far as I can tell, such a thing doesn't exist. Which seems bizarre to me - it's genuinely a mac feature that you can't seem to get on any PC.
EDIT: I fully expect a reply within 5 mins linking to some obvious model i've overlooked and proving me an idiot