I made this wallpaper using Gimp. I used Zwopper's "Alternate Mint Logo"
http://www.linuxmint-art.org/content/show.php/Alternate+Mint+Logos?content=109902
and Kham Tran's photo of mint, as background.
http://upload.wikimedia.org/wikipedia/commons/b/b0/Mint-leaves-2007.jpg
Resolution: 1280x960
You can use it however you like but remember to credit authors, that I mentioned above for their work.