Source : The RegisterSteve Jobs officially announced 8 and 16GB fourth generation iPod nanos.
That's the reason why one's thought this picture which was taken in the Nederlands was a fake cause it did showed a 4GB model.
Contrary to expectations, Apple confirmed they manufactured a small amount of those nanos for limited markets. They're sold for $169 (119) which is more expensive than the current $149 8GB US's price, but about $40 less than the european 8GB's price (149). Color's choice remains just the same.
[translation by Goulwen]