You requested it, and Crytek has answered. A number of the avatar images have been added to the gallery in high resolution. So if you would like to see higher quality versions of the images, or download them as backgrounds then you can now do so! Remember to use our new feature "view larger" to see the full sized image.
Not all of the avatars have been made available but we'll add a few more in the future.
You can find them here: http://www.gamesas.com/gallery - make sure to let us know what you think.