His Dark Materials AU?

Just out of pure curiosity, is anyone in our little group familiar with the His Dark Materials series? The fic I'm writing deals with it quite a bit, particularly the concept of daemons.

If anyone's given any thought to what forms the characters of Les Mis' daemons would take, input would be lovely! I already have some ideas for a few characters, but it'd be great to have some other opinions and ideas, particularly for the Amis, who I'm still not totally confident writing.