The SciFi channel and NBC Universal have announced a 10 episode series available on the web only called Battlestar Galactica: Resistance.
IGN has the story here.
The most exciting news on this front involved Battlestar Galactica, which airs on the NBC Universal owned Sci Fi Channel. Debuting later this year will be a Web series spin-off for the acclaimed series called Battlestar Galactica: The Resistance. Lasting ten episodes, The Resistance will fill in the gap between season two and the upcoming season three.
Unfortunately I’ve not seen any information as to when this is going to start airing.