Just turned on the whole home DVR service within the past hour. I have 2 HR23's and a non-DVR HD receiver, all networked via ethernet through a simple Netgear 10/100 switch. Called customer service and got a very helpful CSR. We discussed my setup and she agreed to activate it as is, although she was pretty sure they would have to install additional equipment. Multi-Room showed up on my menu after a few minutes and I was able to view all recorded programs on all machines, even the non-DVR receiver. No extra installation or equipment charges, and just a prorated charge for the remainder of the month, after that just $3 a month for the service. As the previous poster mentioned, though, I probably shouldn't count on tech support for this setup. So about $50 for the switch and some Cat5 cable, a CSR willing to work with me, and I'm up and running.