So here is my desktop picture of Alduin. :D It's a lower resolution (about half the original) so if you want it and you want it full-res I'll send it to you. This is actually one I edited (I just added the logo up in the corner).
But mostly I just changed it to dragon roars. So I nearly jump out of my skin whenever I get an email. XD
Also, here is a bunch of cool pics I use as a screensaver.