In my Moto X post, I mentioned that I had gotten a MediaDevil Simdevil 3-in-1 SIM card adapter kit.
I wasn't quite sure how it would work but I tried it the other day to put my nano-SIM in my Skyrocket after I flashed it with KitKat.
It worked perfectly. The Simdevil has a very thin film on the non-contact side of the nano-SIM.
The nano-SIM is a press fit in the Simdevil. I actually put the Simdevil and the nano-SIM on my granite kitchen counter and pressed them together.
MediaDevil is a British company and they included a couple of sticks of Maoam in the package. Nice!