If you have the Windows Kinect, I found a good tripod-to-kinect adapter
http://www.thingiverse.com/thing:8570
Note you need to select the "kinect_nut.stl" as he included the original file that does not accommodate the 1/4-20 nut.
Edit: Tried it. Not a good design. You need to bore out the center hole (5/16") for the 1/4-20 threaded screw (from tripod) to pass. Furthermore, on most tripods, only 1/4" or so is available, so you do not over-thread too deep into your camera. With this design, once placed on a tripod, you can't thread into the 1/4-20 nut (you provide). Talk about frustrating! Push, tug. pull, cuss...you might get a half turn in, that's it. Try to lower the Kinect into the adapter and the "snaps" that fit inside the slots of the Kinect break.
This design looks a bit more promising http://www.thingiverse.com/thing:5004