Dial Knob is not a very common UI you would see on a website. However, in webapps that are designed for devices with touch gestures, dial knob can be a very
Ultimate GUInspiratiCollection - ShockBlast presents The Ultimate GUI Inspiration Collection. The best app, web and OS GUIs from around the interwebs. if you find your design in the list, contact us and will link it to you.
Dribbble - Range Selection by Piotr Kwiatkowski
Instapaper read-it later service acquired by Digg-owner Betaworks
Dribbble - file types menu by Matthias Mayr