Flight Status Information.

FLIGHT STATUS

airtext.co.uk
AirText: the UK's largest provider of live mobile flight status information. Get arrivals and departures updates direct to your phone via SMS text msg. AirText - Live Flight Status Information

flightcaster.com
Learn about flight delays even before the airlines notify you. You can find FlightCaster at flightcaster.com or download it straight to your iPhone or BlackBerry. Flight Delay Prediction

flightstats.com
Provides worldwide flight tracking for airlines and airports, including flight status, arrival and departure times, delays, airport weather, cancellations, and flight alerts. FlightStats