Just a quick tip if a new computer is in your future: If you have Office (other than the Home & Student version), make sure to check your new computer for Office before you install it.
This is a mistake I've made twice in less than a year: I blindly installed Office Ultimate 2007 without removing the trial version of Office on the computer. Yes, you can activate Office using your activation key. However when you actually run Office, you'll see a message at the top "Non-Commercial Purposes." Not nice if you've shelled out close to a $1k for software to see.
If this happens to you, what you need to do is uninstall both the Office you installed along with the trial version. If you are unable to remove by using the "Add or Remove Programs" feature in your control panel, Microsoft has instructions here: http://support.microsoft.com/?kbid=928218 on how to uninstall the remnants. Once you've completed the removal, you can install Office from scratch.