Backgrounds... (HUH?)
So what exactly is the difference between backgrounds and photoshop patterns you ask... Well, a MAJOR difference. The Photoshop patterns are presets to be installed in photoshop - with them you can design lots of things. The backgrounds are simple GIF images based on the patterns that you can use as you site background.
Below you will find a few such backgrounds. To save any of the images, just right-click on the image and choose "save background as...".