I suspect it's the company behind the Tube JourneyPlanner runnwing www.planajourney.co.uk but this covers much more than London; it does the whole of the UK, including the Channel Islands, and it has flights and ferries as well as trains, tubes and buses. And trams; putting in Ikea Croydon gets me tram stations in Croydon. They're going to add maps to it; at the moment you get a timetable with a price for as much of the journey as they can, which includes the different train fares available. There are versions for Palm and Pocket PC and one coming for BlackBerry, or the Web site can send the details to your phone. Handy!