Today Ubisoft's twitter account released a link to a web-page containing samples of the pieces in the soundtrack to Assassin's Creed 3: http://world.idolweb.fr/ubisoft-music/lorne-balfe/assassins-creed-3-original-game-soundtrack/3700551741656.html
Let me know what you think of it in the comments below!
Personally, I think Lorne Balfe has done a great job with this sound-track, although I don't think it stands up to Jesper Kyd's work on ACII. I do particularly like 'Connor's Life', although I don't think any of the pieces are as good as 'Ezio's Family'. But overall I think it fits the theme of the revolution, and there are a good mix of loud, fast pieces and slower, emotional ones.