Save data-photo contacts apps etc-before restaure iPhone 4

Hi,
I need help!!
I was updating the software on my iphone4 when the wired temporily disconected. From that moment, my iphone has been showing an image of a connection to itune (to my computer) and nothing else is working, and my computer has been indicating that the iphone needs to be restaured (when I connect it to the computer). However, the restaure function indicates that I will loose all my data. How can I save the data before restauring the phone, when the iphone isnt working?
TX!!
iOS 4