This MagSafe-compatible Tripod Mount, by photography accessories company Moment, is a minimal, handsome and intelligently-designed piece of kit. It's simply a magnet array on a stalk with 1/4"-20 threading on the bottom, allowing you to hold your MagSafe-equipped iPhone securely on any tripod. It's made of aluminum and features padded contact points to avoid scratching your phone or case.
The Pro version adds a little pivoting bar with a cold shoe at the end of it, allowing you to attach accessories.
These run $50 for the base model and $70 for the Pro version.