PostSeason.TV on the pc or mac is the most awesome experience ever. Multiple camera angles, (sometimes even the Blimp cam) instant replay, picture-in-picture or up to four angles at once, all games, no blackouts, no commercials (but you get to see what happens on the field during commercial breaks, just no sound, unlike MLB regular season where you see NOTHING... you don't usually get to hear the National Anthem or Take me Out To the Ball Game tho)
$9 for the whole thing. MLB is $27 or so per month for the regular season)
Screenshades: The first Screensaver for Roku2!
Musiclouds: The best free internet music, on your Roku!
Ouroborialis: Psychedelic Screensaver for Roku!