Here is a very short bit of footage starring the A380 going through its taxy tests in Toulouse. It was featured on M6, a small French channel, tonight I believe. You can hear the engines spool up in the background and I have to say they sound incredible, to the point a shiver ran down my spine!
When the link is established, click on the “Region” link and scroll down to Toulouse.
http://www.m6.fr/html/info/player/frame_soir.htm