Hacking i{phone|pod|touch}

 1.  Toggle the Hold switch on and off. (Slide it to Hold, then turn it off again.)
 2. Press and hold the Menu and Center (Select) buttons simultaneously until the Apple logo appears, about 6 to 8 seconds.    \\    You may need to repeat this step.

• wireless sync
• Syncing iPhones with Firmware 2.x

2) If you don’t trust iTunes backup, you should use SCP or iPhoneBrowser and copy /var/mobile/Library/AddressBook to your computer. This contains your contacts. While you’re at it you may want to copy all these:

 /var/mobile/Library/AddressBook - Contacts
 /var/mobile/Library/Calendar - Your calendar
 /var/mobile/Library/Notes - your notes database
 /var/mobile/Library/Safari - your bookmarks and cookies
 /var/mobile/Library/SMS - your text messages.