Actually, the beacons that a couple of you mention are not the ones between Rohan and Gondor. That region is very far South and not in our playable landscape yet. There is a beacon on top of one of the hills just East of Othrikar in the North Downs, though it certainly isn't part of the Gondor-Rohan system. So while the particulars aren't the same, it's certainly an indirect reference to the Beacons of Gondor.