Buck Woody (MSFT) has published a blog post about SQL Server Desktop Screen Background. I really like the SQL Server Desktop background and I have replaced that background on my work laptop. I came across this particular post because I am regular reader of his blog. Few of the other interesting posts written by him are following.
If due to any reason, the original image is moved, you can download the image by clicking on following image as well.
Reference : Pinal Dave (http://blog.sqlauthority.com)