We're getting close to august, the month the Lubuntu artwork will be released (if finished, of course). Just an sketch bu, doesn't it look sharpy?
You can always check periodically the changes at the wiki. And, of course, you can submit your own creations to the Wallpaper Flickr group. The "contest" winners artwork will be included in the Lubuntu Artwork official package and, if not, everybody will see your work (2560 x 1600 pixels sized) at the Ubuntu Gallery.