One of the more popular features on the Neowin Forums is the monthly desktop thread.
Submission by Mephistopheles on Windows 7.
Submission by Killa Aaron on OS X.
Our community is also quite diverse, Apple gets some lovin' (shown above) as well as the Windows 8 Consumer Preview shown below.
Submission by Mr. Dee on Windows 8
The thread is also a great resource for some great wallpapers that members share amongst themselves, so why not check it out and add yours if you already haven't.
You can find mine in there too.