Our company worked on this (http://planefinder.net), the data is actually live ADS-B information rather than a simulation based on scheduled departure times and destinations. I'd say that's a lot worse!

I could stare at this for hours! Not sure if its a coincidence, but I waited for a plane that would fly past my town (no other planes nearby). When it got reasonably close I looked out of my window and there you have it, plane in the sky. I'd like to think it's the same one.

Wow, that's great. Especially love this route finder view: http://planefinder.net/route/EMA/

http://www.flightradar24.com/ does similar, is it related?

This helps me track my gf while she is working hah! I love this. Do you know the delay on this one? I heard there needs to be a delay of a few minutes when tracking aircrafts? Are you able to confirm? Beautiful work.

And beautiful work to the UK's underground rail tracking as well.

No-one has minded for nearly three years, and TfL are the ones providing the data :-)

We won't, this data is readily available on our data page. In fact our new API will have much more information available, with a lot lower latency.