I just got my old macbook replaced by the new unibody macbook. I had a keyboard skin on my old one to protect the keyboard and it was the full version to cover the palm area as well from dirt and wear. Do you guys think its necessary to get a skin that covers the palm area on the unibody or will a skin that just covers the key suffice? Is the palm area on the unibody easily scratched or worn in color? Any ideas on where to find the best deals on such products?