Only a few years ago I remember being frustrated by the lack of a good online flight-tracking site. All were either too slow, too complicated, too in love with their graphics, or too full of ads.
So now I am happy that I found FlyteComm. The interface allows you to select an airline and input a flight number, or jump straight to your flight via the flight code (e.g., “UAL1020″). All useful information is presented as text, and if the plane is in flight there’s a pretty picture — but fast to load. And there are no ads.
A site to remember.