hey there. i am selling my current iphone on ebay. and it is a 2g and i am going to buy a new 3g one. I want to completely clear the whole phone for the new person that is buying it, what is the best way to do that? Also I want to backup all my phone numbers, music, data etc. What is the most efficant way to back everything up so i can transfer it onto my new 3g model? btw i am a mac user. Thanks