If you’re reading this within half an hour of posting (it’s 5:53PM here in Phoenix), you might want to check out It Happened Here on Turner Classic Movies. It’s a WWII movie based on the premise that the Nazis beat the Allies and it depicts life in postbellum England. I’ve never seen it, so I can’t exactly recommend it. I am, however, going to TiVo it and watch it later. It reminds me of a book I read as a young adult entitled SS-GB that had much the same premise.
The movie brings up the topic of alternate history, an apparently rich subset of history that has virtually no academic standing. It’s almost like the rotisserie league of history and has thrived quite well on the Web and in Usenet.