My research with Jeremy lead me to this.

"The Kungl iPhone Tripod Mount sells for $20 and pulls double duty as a pocket-friendly bumper case. (Credit: Kungl) Want to mount your iPhone on a tripod? There are lots of third-party accessories that can help, but few are as practical or affordable as the Kungl iPhone Tripod Mount . Lest you think it sounds crazy to connect a smartphone to a tripod, consider this: the iPhone 4 sports a 5 ..."