This is a fun little rig. I purchased the ped tripod adapter from http://www.thoughtout.biz/ Specifically I got the kit with the form holder meant for iPhones in a case and the adapter itself. You can find the actual kit at: http://thoughtout.biz/store/index.php?l=product_detail&p=39

I just happen to have a mini tripod for desktops. It came with an old kodak full sized tripod from Sams that I got as a Christmas gift a few years back. The ped adapter went on perfectly. Then the ped form holder just pushes in and the iPhone sits inside the holder. The adapter itself is just the L bar you see screwed into the top of the mini tripod. So if you already have a ped3 holder you just need the adapter itself.

Now I can turn on video recording with my iphone, put my canon S2 IS on the large tripod to record video and have a two camera video shoot. *lol*