Matthias Büttner's website features photographs from Germany, Poland, the Czech Republic and China, mainly steam but also endangered species of railcars, diesels and electrics. Well worth a look. The text is in German but it's not difficult to find your way around the site if you don't speak the language.
Stránky přátel železnic (SPŽ)
News and photos from Slovakia and the Czech Republic plus other useful information including loco diagrams. Slovak language.
News and photos from the Czech Republic. Czech language.
Czech Slovak Gen
A useful English language news group for the exchange of information on Czech and Slovak railways, particularly the current scene.