We have already sent a post to this forum regarding the site below but it deserves one more.
The site is maintained by a brazilian user (we get more and more users from Brazil each week). It shows in real-time Sao Paulo ATC + RadarBox Real-Time Radar.
Have a look:
http://www.maquinasvoadoras.com.br/rb/SBGR-RADAR.htm
Now the question: anyone available to do the same for any of the major european airports?
Note to Theo. There are live feeds around, like this one, now at http://www.maquinasvoadoras.com.br/india.html