Good luck with that, I have been trying to find a way of saving the iphone4 calendar to my computer. As I do not have outlook express this would seem to be beyond possibility with Apple. All I wanted to do was make a back up on to my computer incase the phone got lost or failed. Sometimes I do wonder about Apple, love the phone but there really are so many buggy things especially with itunes.
Incase anyone can help me, I have Vista and Windows Mail. According to itunes there is no compatable program on my computer. I did read some complicated instruction about googlemail but I also read somewhere that it can wipe the calendar as you do it. Too ridiculous for words.