what about supporting pvrs like tivo, but particularly like replaytv, which already has lan streaming capbilities built in. replaytv records mpeg-2 files which should be easy to play in xbmc.
i would absolutely love to have this feature. currently, i use dvarchive to transfer shows from my replay to my pc. i can then use xbmp (and now presumably xbmc) to stream the show from my pc to an xbox in another room. if i could stream directly from replay to xbmc then i'd be able to skip a significant step, and save a ton of time. the replay and xbox could work so well together!!!