The Tech Zone has posted a how to on folding IDE and SATA cables for a super clean looking system.

Folding cables serves two purposes; to create a super clean looking system and maximize air flow going though the computer case. Nothing messes up air flow more than a bunch of dangling IDE cables. Rounded cable helps this problem but they still tangle inside the case and still block airflow. A properly fold IDE cable will snake along the sides of the case so air flow is not disrupted and will look cleaner than anything you can do with rounded cables.

Read more