I was trying to stream a 720p .mkv file earlier today and ran into major buffering issues. Rough calculations say that for every 1 minute of buffer time gets me 45 seconds (or less) or playback time. SD streams are flawless (less data). Does the TiVo HD have gigabit networking capabilities? What kind of resources should my computer be outfitted with? I'm running on a clean install of Windows Server 2008 x64 (Vista family). My network is wired.