www.lalalandrecords.com are releasing a soundtrack cd for Terminator: The Sarah Connor Chronicles. I understand it's due out on 16 December.
The soundtrack mainly features music by Bear McCreary from the first and second seasons. You may be aware that he also writes the music for Battlestar Galactica.
As an added bonus the cd contains the song “Samson and Delilah” performed by none other than Shirley Manson herself. It was that song that kicked off episode 1 of season 2.