Well, I bought an iPhone in the US with my French Centurion card so that is the reason for my question.
I agree that the iPhone has a few flaws (no 3G support, no "Notes" support, can only sync to ONE computer etc...) It is however an incredible device and that is why I bought one.
I am praying for the software unlock to be released next week so that I can use it with my French sim card...