Found some wonderful London Underground map links and a blog devoted to maps.

The Map Room features links to all sorts of maps. Recent entries (here, here, here, and here) focus on our recent elections, with links to maps that present election results in creative ways, like this New York Times map which uses population density to show red and blue America in a way that may be somewhat less scary to the blue blue voters.

The Map Room also links to an archive of maps of the London Underground from 1905 to the present, and to this Grauniad article about Henry Beck, the man who designed the distinctive Underground diagram.

Speaking of the Underground, you can find another tube map archive here, the rules for the game Mornington Crescent (and a simplified Java version) here, and a funny but practical "Ultimate Guide to the London Underground" here. The London Transport Museum has an online shop, which offers among many other products customized clothes with your favorite station name or slogan. My favorites (and it is my birthday, hint hint) are a London trivia game with the tube map as the game board, and a CD containing the TrueType and Postscript versions of the Johnston font used on Underground maps and literature. (The font in the logo for this site is Gill Sans, which is similar but not an exact match for Johnston.) (The font is available less expensively here.)