717 The Wife™ turned me on to this one today: it's Desktop Starships, http://www.desktopstarhips.com. A metric ton of wallpapers from more than one genre (Battlestar Galactica, Star Trek, even Space:1999 represent there) in a wide variety of resolutions to mix with almost any monitor dimensions.
The vast majority of this art is skillfully executed, realistic–and free. As in, doesn't cost ya nothin'!
So if your desktop's looking a little drab, go!
Tags: netlife, desktops, wallpapers, free