A small addition to the thread - I've changed some URLs that I posted
before. To find the map use the main URL (it will remain useful):
http://www.fxfp.com/lib/tube/

This is due to the release of first test version of future extensions
map - only first phase of East London Railway so far (and Regent's
Park :-P ). But I have huge plans - for example I'm preparing
historical map for 22nd Dec 1932 (I wonder if anybody will guess all 5
reasons that made me choose that particular date?).