Oh nothing big! Well no I don't think any wallpaper can be as famous as Windows XP Bliss.. (IMO)
But Ubuntu (Operating System) is running a wallpaper contest.
Two different groups (I am not sure why).
Details are here:
Ubuntu GNOME 14.10 Wallpaper Contest Opens for Entries
and here:
Ubuntu 14.10 Wallpaper Contest Now Open for Entries | OMG! Ubuntu!
The contest group on Flickr are here:
https://www.flickr.com/groups/ubuntu-gnome-14-10/
and here:
https://www.flickr.com/groups/1410wallpapersubmissions/
Good luck!
---------- Post added 08-10-14 at 02:31 PM ----------
P.s. I think targeted more towards amateurs