I ordered the unlocking of my iPhone 4 online on last Sunday and received a confirmation to my email on 19 hours later. I backed the phone up before starting (just to be safe) I was expecting some message on the iTunes screen but but there was none. I entered my new sim card however and it accepted it so I guess it was unlocked. I am really very happy with the service I received. This was a factory unlock at a fraction of the price of my operator.
Lorraine