Here is <a href="http://www.multimania.com/airbus/1er_vol_de_l'A318.htm" target="_blank">one of the webpages, in french</a>, where you can see several photos from the first flight.
It also has a link, near the top, named "video", to a zip file which, when unzipped, contains a 1.3Mb, 15sec mpg video clip of the A318 taking off.
Also, here is <a href="http://tagesschau.de/styles/container/video/style_video_real_smil_cover/0,2162,490566,00.ram" target="_blank">a report on the A318</a> and its first flight from the ARD-actuel news bulletin (in German of course). It is a RealPlayer streaming video.