Is it possible to activate an iPhone 4 without a SIM? So we bought an iPhone 4 from the Apple store. But we didn't get a micro-SIM as there are no PAYG tariffs on micro-SIM available.

Is there anyway to activate the device without getting hold of a SIM? I don't want to sign up to a contract just to develop with.
Maybe you know somenone who owns an iPhone 4 already. Ask her/him for the micro SIM, put it into your device, activate your iPhone and give the micro SIM back to the other person.