I'm the mainstream author of gWallpapers. The debian source package is
also available via Launchpad:
I'm not familiar with the process of getting packages into the Debian
archive, but I ever wanted to know how it works :)
In a few days I want to release gWallpapers 0.7.1, so I'm going to
package the new release, test it and afterwards I'll try to find a sponsor.