“iNotify Tube” is a simple and no-fuss application to keep you informed of London Underground’s Tube status.

Features:

* Built-in notification functionality via Apple’s Push Notification;
* Ability to push out updates at a user-specified timing;
* Choose multiple tube stations to include in the notification alert;
* Notification occurs in the background (no need to have the application running or active);
* FREE!

http://appshopper.com/travel/inotify-tube