I've already reported of the Windows 7 screaming deal in US, now it is also possible in Europe: I've just preordered a copy of Windows 7 Home Premium for 49,97 Euros at Conrad, a German electronics shop. Windows 7 was sold out at Amazon after a few minutes.
Windows 7 should be available also at least in UK and France, I'm not sure about Italy.
A reminder: if you preorder Windows 7 now, you'll get it (earliest) on October 22nd.
PS: I was also a bit disappointed to see that Amazon hasn't been able to cope with the big numbers of visitors, the shop cart site was down for some minutes, apparenlty they don't use efficiently the Amazon cloud computing servers (S3).