TechReviewSource.com posted an upgrade guide to Windows 7
>> Windows 7: How to Upgrade
With Windows 7's release date coming quickly, it's important to understand how to update your existing computer to Windows 7, if that's what you elect to do. In performing an update from either XP or Vista, make sure you know the process in order to prevent data loss or any other critical errors. You must also make sure your computer is compatible with Windows 7 and our quick guide to upgrading will show you the way.
>> Windows 7: How to Upgrade