Under Windows 7 - when selecting the background as your wallpaper, "Fit Mode" seemed to look best IMO.
Here is a sharelink for anyone else that wants it. It's in .png format.
Special thanks to "Suffca" for editing out the annoying play button.
http://i.min.us/iX7vk.png
My second attempt... This is the eye of the dragon from the HD video. I added in the TESV and Skyrim logos. 1680x1050
http://i.min.us/idxhWS.png
http://i.min.us/idsP4E.png
My third wallpaper per request by Lithtekano
http://i.min.us/idGRd2.png
UPDATE: Special thanks to "PureLight" for posting an EPIC screenshot calogue! It's a massive 6000x1488 .jpg
http://i.min.us/iXWUY.jpg
http://i.min.us/iXDJO.jpg
UPDATE: Special thanks to "shadowbeast368" for this full size cologue created at 1920x1200. It includes the whole stone slab with the logo at the top and the Akatosh symbol at the bottom. (I think that's the Akatosh symbol)
http://dl.dropbox.com/u/3593710/TESV-Skyrim-Background.png
UPDATE:Special thanks to "MC.Jesus" for adding the classy borders to "shadowsbeast368's" original screenshot...
http://dl.dropbox.com/u/12965950/TESV-Skyrim-Background-LightBorder.png
http://dl.dropbox.com/u/12965950/TESV-Skyrim-Background-DarkBorder.png
UPDATE:Special thanks to "Suffca" for brightening "shadowbeast368's" original screenshot text
http://i.min.us/iTkTk.png
UPDATE:Special thanks to "shadowbeast368" for this cropped wallpaper showing Dovahkiin and the dragon. Also includes the release date, and logos. Additional credit goes to "MC.Jesus" and "Suffca".
http://dl.dropbox.com/u/3593710/Skyrim-Wallpaper2.png
http://dl.dropbox.com/u/3593710/Skyrim-Wallpaper2.png
UPDATE:Special thanks to "shadowbeast368" for editing his original wallpaper with brighter text and transparency Additional credit goes to "Suffca" and "MC.Jesus".
http://dl.dropbox.com/u/3593710/Skyrim-Wallpaper1.png
UPDATE:Special thanks to "MC.Jesus", "Shadowbeast368" and "Suffca" for the ultimate wallpaper. This is shadowbeast368's image combined with MC.Jesus's border and date combined with Suffca's brighter text.
http://dl.dropbox.com/u/12965950/Skyrim-Wallpaper1-WithDate.png
UPDATE:Special thanks to "archmage" for taking PureLight's full 6000x1488 image and adding Shadowbeast368/MC.Jesus/Suffca's logo work. Additionally, archmage made some brightness and contrast changes. A nice ccompliation of everyone's high quality work.
http://img190.imageshack.us/img190/8803/tesvwallpaper.png
http://img686.imageshack.us/img686/8803/tesvwallpaper.png
UPDATE:Special thanks to "Kitzler" for creating a spectacular variation of my original Dragon Eye wallpaper.
http://i.min.us/jdsJwI.png
UPDATE: Special thanks to "Jonas Sanctor" for these very nice screenshots! Feel free to add in title and logos.
http://www.shiniku.com/images/host/sky_paper_1.png
http://www.shiniku.com/images/host/sky_paper_2.png
UPDATE: Special thanks to "Real Challenge" for this one...
UPDATE: Special thanks to "cibernetic" for both of these very high detailed screenshots!
http://www.picfront.org/d/7YSS
http://www.picfront.org/d/7YWa
UPDATE: Special thanks to "JDfan" for the brighter full miral wallpaper variation.
http://i212.photobucket.com/albums/cc189/JDFanning_bucket/Skyrim2.jpg
Special thanks to "noodle469" for pioneering the screenshot - wallpaper effort. Your efforts on creating your OG image will not be forgotten.
http://www.gamesas.com/index.php?/topic/1148104-elder-scrolls-teaser-page-is-live/page__st__20__p__16782662#entry16782662 and the http://imgur.com/cGCFJ