Great, and very unexpected news, after so many months of waiting. I agree the show will probably never recapture what it had in Season 1, but Glenn Close is still one of the best working actresses on TV. I do hope Patty gets some of her spark back, and also that Rose Byrne gets a little...sparkier too - the show is at its best when the two of them are playing mind endless games each other.
Hopefully shortening the seasons to 10 episodes each will help tighten them up a bit also, as seasons 2 and 3 were both a little unfocused and rambling at points.
The only bad part of this news is having to wait until Summer 2012, or effectively until 2013 for the DVD releases for those of us who don't have DirecTV (or know what the hell DirecTV even is, like myself).