Its a great song.
Open C tuning sounds wonderful, its very folk-ish-type-something, sort of.
Listen to this example, and you'll know what I mean.
Its a short bit from a song published in Total Guitar magazine, I dont know whether its an artist or the people at TG who has come up with the song.
http://www.guitartricks.com/2000/trick.php?trick_id=4330