Annie Mole's, webmaster of Going Underground, daily web log (blog).
If you like this you'll LURVE One Stop Short of Barking, THE fun and informative BOOK about travelling on the London Underground.
Now some clever person, Ben Green, has built a great time wasting tool "Badgers in Pimlico" so you can type in words and see which stations do not contain its letters.
Amazingly there's only one station that doesn't have any letters of the word "Underground" in it (thanks to @qwghlm for that) and that Debden is unique in at least two ways (thanks to Paul Clarke & Richard George for that).
"The magic, mystery & sometimes maddening shortcomings of London's Tube are documented with love, enthusiasm & sometimes despair by its unofficial social historian." The Guardian