I know this is a little late but when something like this pops up you have to tell folks about it. If you have any desire to upgrade to Windows 7 this may be the time to order. Read all the details on the Microsoft Windows Blog about the offer. The following is from the blog:
"Finally, as a way of saying thank you to our loyal Windows customers, we are excited to introduce a special time limited offer! We will offer people in select markets the opportunity to pre-order Windows 7 at a more than 50% discount. In the US, this will mean you can pre-order Windows 7 Home Premium for USD $49.99 or Windows 7 Professional for USD $99.99. You can take advantage of this special offer online via select retail partners such as Best Buy or Amazon, or the online Microsoft Store (in participating markets)."
Lately I have been concentrating on Firefox and Linux so it was easy for me to let this news slip by. Personally I have no intention of upgrading to Windows 7 until I buy a new laptop. I don't see any reason to updgrade until there are benefits for my equipment. Your milage may vary so if you were or are planning to upgrade you might want to consider this offer.