I got a micro-sim in Italy last month at a Vodafone store. The clerk had mistakenly opened a regular Sim for my Nexus and had started entering the info. I pointed out I needed a micro-sim and he went to open a new micro-sim package. Wanting to save him the effort, I asked if it wouldn't be easier to ciut it down. He said no because that was a 50/50 proposition.

So, you might want to be careful about approaches built around cutting down a regular SIM.