Didn't work for me, they said they couldn't do anything since the phone isn't out yet. They also said the stores will have sims when the nexus is officially released.
They told me sims will be shipped to the store.
It takes all of 5 seconds to cut it down to size, all you need is a micro sim template, tape and some sharp kitchen scissors.
Same thing they told me.
Yeah, very easy to cut down. I have done it for a few friends recently. Just download a micro sim template, get some tape and some kitchen scissors(usually more sturdy and a lot sharper than just regular scissors)