Paul Ford, aka Mr. FTrain, wrote Speculation: ReichOS a couple of months ago. Other than being a cute piece of metafiction, the story makes some very important points about the nature of technology by considering what the Internet would have been like had the Germans won the Second World War.
Then, today came the news that a new book alleges that IBM sold the Nazis punch-card machines, machines IBM knew would be used to track Jews sent to the concentration camps. There's very little any of us can dream up, no matter how awful, that history hasn't already thought of, it seems.