One of our sponsor sites posted a very useful article on How To Replace Your Original iPhone With The New iPhone 3G.

Here is the quote from the article:

Many of you currently have an older iPhone and you plan on upgrading to the iPhone 3G but what do you do with your old iPhone? So how do you smoothly move from the original iPhone 2G to the new iPhone 3G and keep all of your current information, songs, and files?

It is actually a very easy process to push your original iPhone info over to the new iPhone 3G. iTunes will allow you to do this and on July 11th when and if you pick up your new iPhone 3G you can use the backup of your old iPhone and push that information over to the new iPhone 3G. All of your passwords, SMS messages, email accounts, contacts, photos and other personal settings will all be transferred over with ease.

Here are a few steps that will allow you do this once you get your hands on your new iPhone 3G.

1. Connect your original iPhone to iTunes and sync it. You must verify that you have backed up your
2. Disconnect your original iPhone and connect your new iPhone 3G to iTunes. iTunes will now ask you if you want to restore from a backup or set up the iPhone 3G as a totally new phone. You will want to select the option to restore from a backup option.