This video is an interview with Skandar Keynes (Edmund) and Anna Popplewell (Susan). Gotta love them :)
This is an interview with Georgie Henley (Lucy) and William Moseley (Peter). They're both really funny :D
This one's really funny and has lots of LWW behind-the-scenes facts. (It's a little old, so by "sequel" they mean Prince Caspian.)