OK. Simple solution. Two 921s set to the same remote code. Use the UHF on the remote to set up the recording on one unit (while the other unit is also powered on), and voila, both units get set up for the recording. In fact, do this for all recordings and you've got the same content on the hard drives of both units. Then, it won't make any difference where you want to watch, you have the same content available at both locations. This sounds a lot easier than trying to string a long Firewire cable from one room to the other, especially if they are on different floors. I don't know how long a Firewire cable can be, but the longest one I've seen as been about 12 feet in length. I don't know if a 50 or 100 foot cable, which is what you might need to go from one room to another, even exists or would work.