There has been a quiet revolution in real-time public transport information in London (UK) also.
Transport for London has equipped all buses with real-time GPS and this info is available via web and SMS.
Apparently they are looking for third-party developers to use their APIs but I've not seen anything yet.
Here's how to find when the next bus is coming:
Since most ticketing is now electronic (the Oyster card system) there is also live info an nearly all the millions of passengers; at the Transport Museum they have some displays showing this off.