The Guardian's NewsBlog has pretty good coverage of the London bombing. "Four explosions are confirmed. One on a tube train between Aldgate and Liverpool Street, one on a bus, one in the tube at King's Cross, another at Edgware Road."
Google Maps launches in the UK with London Tube stations right on the map. Google, please, please, please, please, please, please, please, please do the same for the NYC subway. Please?