July 11th is the cutoff for saving up to %50 on your Windows 7 upgrade. Both Amazon and Best Buy, as well as the Microsoft Store are all offering special pricing on Windows 7 Premium and Professional upgrades for people in the US until Saturday. After that you’ll be paying full price. As well, special pricing is set to start for the UK and select European countries on July 15th, so be ready.
I’m not sure how worth it this is considering the recent announcement of family pricing, but if you only need one copy, you’d better get jumping!