I ordered the Windows 8 Pro upgrade. I'm actually impressed that they are using a good currency conversion for once unlike their other products, probably to avoid putting off tempted EU users. I received their US$40 upgrade offer due to trying the developer preview and when I changed the country drop-down to order, the price changed to â‚¬30 inc. VAT.
I'm not sure yet as to whether I'll use Windows 8 as my main OS, but definitely want to get familiar with it. I learned the hard way by completely skipping Vista at home, as while I had no problem moving from XP to 7 at home, I dealt with enough Vista headaches trying to help friends, colleagues at work, etc. with computers running vista and being unfamiliar with the OS made troubleshooting quite tricky.
I got the Windows 8 Pro key within a minute of the order, but not so for the Media Center key. Then again, it's no big deal as I think I only used Media Center once in Windows 7. Either way, many thanks Kerry for the offer, as this is the first I've heard of this promotion.