Ryan McAvoy said:
This page has some very hi-res images from the trailer...
http://www.insidethemagic.net/2014/11/star-wars-the-force-awakens-trailer-debuts-online-giving-a-first-look-at-episode-vii/
Plus a super detailed iMAX shot of the Falcon that would make a nice wallpaper.
I recognize one of the commenters from elsewhere. Some people really get around!