On the official fan page, a special Fan Kit has now been made available for free download. Among its contents you will find (mostly already known) official artworks, logos and other stuff you can use to decorate your desktop. They are also made available for use on non-commercial personal websites, blogs and social networks.

Download the fan kit in .ZIP format from Ubi's site here (269MB). I have also created a torrent for those of you who are unable to d/l the whole file directly.