I backed the new Glif iPhone tripod mount and mine showed up a few weeks ago. Studio Neat has come a long way with this product. The newest Glif is spring loaded and pulls back easily around your phone (any size, in a case or not). You then just press down the quick release lever and you’ve attached three tripod mounting points to your phone. The whole thing easily fits in your jeans’ pocket. Quick. Secure. Portable.
If you want to go crazy, Studio Neat also sells a wooden grip with a tripod screw on top and wrist strap. You can combine this with the Glif to have a nice comfortable handle for your phone. I used it in this configuration recently at Disneyland while walking in a crowd. Combined with the iPhone camera stabilization, it took some great video for something I just pulled out of my pocket. As an aside, you’ll see some cranes in the background at the end of the video. You’ll never guess what those are for.
This third iteration of the product is so good that I'm not sure where they can go next. If you have any desire to put your iPhone on a tripod, look no further.