We stumbled onto this one while playing around on the internet. We've seen guides that show users how to cut down their SIM cards and magically turn them into micro SIM for the iPad and iPhone 4.
It looks like a stapler, but it's designed to make cutting down your SIM a lot easier. We know that many of our readers enjoy modifying their iDevices. The truth is, we hate sounding like a product endorsement, but this is just one of the many tools you can buy online to do this. We Googled around for terms like Micro Sim Cutter and found several similar products.
Micro Sim Cutter Here.