I guess the only country I can speak intelligently about is the U.S., since that's where I'm from and I've only visited 3 other countries, so far (although I am in the early planning stages for a trip to Romania.)
However, that being said, I have been to Ireland and I got to thinking, what did I see there that was different from the U.S.? The first thing that jumped to my mind was the selection of chocolate bars and sweets. And since every country tends to have its own variation of candy, perhaps each of the countries could have a small candy shop with things native to that country.
Oh, and I do think they should add Ireland

(and please, nobody post something stating that they have the U.K. already, I don't mean the U.K., I mean the Republic of Ireland.)