Tired of the stock wallpapers?
I got this link from another forum:
The person suggested using 1024 x 1024 iPad from the dropdown menu. It looks great. Assuming you're on a computer, click download, the image will open in another window, right click on it and save it to a folder on your computer.
Now transfer the images to the NOOKcolor. Place them in the "Wallpaper" folder which is located in the "My Files" folder.