I've done Beers Around the World 10 years running. My last visit was Spring 2009 (next trip is a month away). After looking at your map, here's what I've noticed:
Mexico: Offers Tecate as well as Dos Equis.
Norway: Carlsberg (Denmark) purchased the Ringes brand a few years back. They no longer export Ringes outside of Norway. As a result, the Norwegian pavilion has offered Carlsberg on tap ever since.
China: For some uknown reason, the Chinese pavilion now offers Yuengling (Pennsylvania) along with Tsing Tao. Just because Yuengling LOOKS like it could be a Chinese name seems like an odd reason to offer a domestic beer at this pavilion. I know they have a brewery in Florida (I believe in/near Tampa), so perhaps that's a reason WDW is carrying the beer, but unless it's a huge seller over in China (which I don't believe it is), color me confused on this one. Still, it's a damn good beer.
African Outpost: They've been selling an Amber beer here the past few years (I believe it's from one of the domestic breweries). Can't remember the name, but I think it's something like Safari Amber.
Germany: Becks, Spaten Optimator (and sometimes Spaten Oktoberfest), Lowenbrau, Franziskaner. All go good with a brat & sauerkraut.
Italy: looks good
USA: looks good
Japan: looks good (still waiting for them to add Sapporo)
Morocco: Casa Blanca & Bud Light
France: looks good
UK: Other than what you've listed, the UK also offers Boddington's (Manchester, England) and Stella Artois (Belgium) on tap. Even though Stella is a Belgian beer, it's one of the top sellers in the UK, hence the inclusion.
Canada: looks good