It is stripe mania over at Stripemania.com. There they have a stripe generator to help you make slick, striped backgrounds in web 2.0 or web 1.0 flavors.
Need some stripe inspiration? Check out Stripe.licious, Stripe Mania’s collection of user created stripes in all types of colors and widths. Whichever method you chose to get your stripe, you can download it in either a transparent background or regular gif. The images come ready to be tiled as a seamless background for your next web or graphics project.
Pretty self explanatory but very well executed.