The latest Metro v5.3.3 contains an updated London Tube database, but the database does not reflect the distruption of the London Undergound system with partial closures of a couple of lines (Piccadilly Line, Circle Line etc.) and stations due to the London bombing. You will need to download the special London Special database.
Example: A simple trip from Acton Town to Wood Green would normally require a single trip on the Piccadilly Line, but because of the Piccadilly Line closure between Hyde Park Corner and Arnos Grove, such journeys would undoubtedly be much more complicated. Metro with the London Special database solved that with a simple instruction:
Take the District Line eastbound to Victoria (you can also use the Piccadilly Line/District Line route where you should ideally change at Earl's Court although I prefer changing at Hammersmith). At Victoria take the northbound Walthamstow Central national rail service to Seven Sisters. Once there take the Special Bus B to Wood Green (direction: Arnos Grove). Nifty eh?
I have been using Metro for four years now and the database is tops. Excellent support by Patrice and Frank. And you can download additional database of other cities' network onto your device.
Metro is compatible on PDAs running Pocket PC, PalmOS, Symbian UIQ and Symbian Series 80. You can also use Metro on Smartphones running Symbian Series 60 or Microsoft Smartphone.
If you prefer a program with a GUI of Mr. Beck's tube map try Visual IT's Tube 2 London instead.