I'm guessing this might be one of those things that everyone knew about it before I did ... but in case you were in the dark as well and a Battlestar Galactica fan:
With the Battlestar Galactica podcast, you can listen to exclusive commentary by executive producer Ronald D. Moore about each episode, while you're watching it.-- SCIFI.COM | Battlestar Galactica
Works simply enough - download the podcast and then start when it says "The Cylons Were Created By Man". Commentary will then be synced to the program. They even have ones that beep with commercial breaks. Sweet!
tagged: scifi, battlestar