The Thirty Years War is a website covers that ginormous kerfuffle that consumed Europe in the first half of the 17th Century from the Second Defenestration of Prague to the Peace of Westphalia. It has a handy map with a place locator which will help you tell your Schweidnitz from your Schweinfurt. Here are some other maps, The Religious Situation in Central Europe about 1618, Principal Seats of War, 1618-1660 and Europe in 1648 - Peace of Westphalia.
The BBC World Service has put together a special report on the 1989 revolutions in Eastern Europe (they also have a simpler portal). There is a wealth of material, including TV reports on key events from the BBC archives, interviews, a map timeline, a report on Catholicism's role in the 1989 revolutions, a first-hand report of what it was like to gather news in East Germany during that time and much more.