very nice dvd cover for ubuntu studio

https://wiki.ubuntu.com/UbuntuStudio/Artwork/UserContributed?action=AttachFile&do=get&target=ubuntu-studio-cd-7-10.png

Here is the source svg




also there are some wallpapers/firefox themes that can be used in windows too
https://wiki.ubuntu.com/UbuntuStudio/Artwork/UserContributed

here is the official hardy work