Speaking as one of the original authors of this project, I'm going to have to say that the previous version that was hosted on MegaUpload will not be put back up...
As it's terribly out of date and there's a brand, new version that can be found at this link
This new version only contains updated and new backgrounds.
As a reminder, this is an open project and help is always welcome. See the help wanted in the first post for more details on how you can help out.