It officially uses the ethernet to get Listing updates, and if you have 2 replays in the house you can stream to one another and they'll work together, (say if 2 shows are on at 8, 1 will get 1 and the other get the 2nd one). You can run DVArchive to make your computer look like another replay and stream shows to your computers HD.
Burn ReplayTV to DVD
http://www.techtv.com/screensavers/h...635552,00.html
Play Your PC's Video Files on ReplayTV
http://www.techtv.com/screensavers/h...651260,00.html
Turn Your PC Into a ReplayTV Unit
http://www.techtv.com/screensavers/h...423839,00.html 
Linear Mode
