Here’s a temporary solution to the activation problem:
Delete the following keys:
Now start an Office 2007 program. It will ask you to enter a new product key. Enter the following:
Office will run through some procedures to finalize the license. Then you’re good to go!
Note: The product key shown here is publicly available on Microsoft’s website. (HERE).
This method can also be used to change your product key back to the one issued to you when the activation servers are working again. Have fun.
That is a direct copy and paste from the www.neowin.net forum. It works like a charm and you should be able to now use Office 2007 Beta 2 TR until the end of the time bomb which is sometimes in February of 2007.