When I moved to nyc, my linux mythtv dvr stopped working. In the name of progress -- or more likely, encouraging you to buy their own dvr -- time warner does not provide analog cable. This means your dvr has to actually change the channels on your cable box. So naturally I did what any bitter engineer would do: watched commercials for a year, then hand soldered an infrared widget. It has a 20mhz avr in it and I'd been planning on programming it to be a fully general transceiver, but strangely enough, my motivation disappeared after it became capable of changing channels reliably.