Here are some cool desktops found on the internet (mainly on Linux Mint forums) (all Linux, obviously!) Credit goes to mmesantos1, oscar799, colyn, ibm450,cra1g321,knuckles,red-e-made, and more! First 4 desktops are mine.
For some more ideas into desktops, and ideas for which you would like a how-to on, go here: http://forums.linuxmint.com/viewtopic.php?f=6&t=10828&
The first few aren't that interesting, so i reccommend browse up to at least page 60.