I happen to find the following video on Youtube this afternoon from Kaye Wood and her guest showing how to make a fractured bargello jacket similar to this tutorial, but a bit more structured. I've never made a bargello quilt, but I loved the way this jacket turned out.
http://www.youtube.com/watch?v=x9CX8xDNn8w
Regardless of which method you prefer, the guest on this video gave one huge tip. Have your sweatshirt wrong-side out when attaching the fabric. You should sew to the fuzzy side. That puts the nice smooth side of your sweatshirt to the inside. By putting the sweatshirt inside-out, you don't have to worry about the fuzzy inside of your jacket pilling up on you or your clothes.